Diabetic Macular Edema and its Management: Ophthalmology & Optometry Information Guide

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
A young woman at an optometrist is having her eyes scanned.

Diabetic Macular Edema and its Management

Diabetic Macular Edema (DME) is a condition that happens when there is swelling in the central part of the retina, which is the light-sensitive tissue at the back of the eye.

The macula is the area of the retina responsible for sharp, detailed vision, like reading or recognising faces. DME can worsen over time if left untreated, and without intervention, it can lead to permanent vision loss.

A walkway in the forest, viewed by a person with advanced diabetic macular edema.

What Happens in DME?

In a healthy eye, the retina receives oxygen and nutrients through tiny blood vessels called capillaries. These capillaries should remain tight, allowing only necessary nutrients to pass through. However, in individuals with diabetes, these blood vessels are damaged and leak fluids into the retina. The fluid accumulates, causing the retina to thicken, which disrupts the way the retina processes visual information. The swelling primarily affects the inner and outer layers of the retina, leading to blurry or distorted vision.

DME can occur at any stage of diabetic retinopathy. Whether mild or severe, DME

remains a potential complication that needs attention to prevent further vision loss.

How DME Affects the Retina

The retina does not have a lymphatic system to drain excess fluid. However, the diabetes damages the blood vessels, leading to two main issues:

  1. Vessel leakage: The blood vessels become leaky, allowing fluid, fats, and even blood cells to escape and accumulate in the retina. This swelling, or edema, occurs specifically in the macula, the region responsible for clear central vision.
  2. Vessel closure: In some cases, the blood vessels become blocked, depriving the retina of necessary oxygen and nutrients. The retina responds by attempting to grow new blood vessels (neovascularisation). Unfortunately, these new vessels are fragile and often leak more fluid, worsening the swelling and damage.

Risk Factors for DME

Several factors can increase the risk of developing DME, including:

  • Duration of diabetes: The longer someone has diabetes, the higher the risk of developing DME.
  • Blood sugar control: Poorly controlled blood sugar significantly raises the risk.
  • Type of diabetes: Type 1 diabetics usually develop DME after at least five years of diabetes, while Type 2 diabetics may develop it earlier due to undiagnosed damage at the time of diagnosis.
  • Kidney disease: Diabetic nephropathy, or kidney disease, is linked to a higher risk of retinopathy and DME.
  • High blood pressure: Hypertension can worsen diabetic retinopathy and increase the risk of DME.
  • High cholesterol: Poor lipid levels can also exacerbate DME.
  • Pregnancy: Pregnant women with diabetes may experience faster progression of retinopathy and DME.

Treatment

The treatment goal is to control the swelling and prevent further vision loss rather than drastically improving vision. Treatment options include:

  • Managing diabetes, blood pressure, and cholesterol can help reduce the risk and progression of DME.
  • Laser treatment, steroids, or anti-VEGF (Vascular Endothelial Growth Factor) injections.
  • Surgery

Practical Lifestyle Approaches for Managing DME

Simple adjustments to lighting and contrast can make daily tasks more manageable for people with Diabetic Macular Edema (DME).

Visibility improves in brighter environments. Focused lighting, like a desk lamp, can help see fine details. Additionally, adjusting brightness levels in dim settings helps reduce difficulty seeing.

Using high-contrast settings, like black text on a white background, makes reading and seeing objects easier. Tools that enhance contrast, such as magnifiers or special screens, can improve visual clarity and help people with DME manage their vision challenges.

LumiLab guides, webpages, and articles discussing optometry and ophthalmology are intended only for educational and informative purposes and do not serve as medical or professional advice.

The information presented, including but not limited to text, graphics, images, and other material, is for informational purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment.

Always consult your physician, optician, or other health care professional if you have questions about your eye health or vision.

Stock image by Freepik – www.freepik.com, Outdoor walkway images by LumiLab

Download this Ophthalmology & Optometry Information Guide

Retinitis Pigmentosa and Quality of Life: Ophthalmology & Optometry Information Guide

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
An optometrist is checking a young woman's eyesight.

Retinitis Pigmentosa and Quality of Life

Retinitis Pigmentosa (RP) refers to a group of hereditary eye disorders. This condition leads to progressive damage to the retina. Over time, this damage leads to vision problems and, eventually, vision loss.

A view looking down a stairway, viewed by a person with advanced retinitis pigmentosa.

Causes of Retinitis Pigmentosa

It is a genetic disorder inherited from one or both parents. It is a collection of eye diseases caused by gene mutations that control the production of proteins. These specific proteins are responsible for the proper functioning of the photoreceptor cells.

The mutations responsible for retinitis pigmentosa are located in several genes, and different mutations can cause various types of retinitis pigmentosa. The genes involved in retinitis pigmentosa code for proteins essential for the health and function of photoreceptor cells.

Even small genetic mutations can have severe consequences, such as the inability to produce the required protein or the production of a toxic or abnormal protein.

Any of these issues damage the photoreceptors and impair their ability to function correctly, leading to vision problems.

How Retinitis Pigmentosa Affects Vision

Retinitis pigmentosa impacts the photoreceptor cells in the retina, which are responsible for converting light into electrical signals that the brain processes as visual images.

There are two types of photoreceptor cells:

  • Rods: Help you see in low-light conditions and detect objects outside your direct line of central vision, called peripheral vision.
  • Cones: Help you see in bright light and are responsible for sharp, detailed central vision and colour vision.

With retinitis pigmentosa, the rods in the retina are typically the first to be affected, which leads to night blindness. As the condition progresses, the cones also start to deteriorate, causing loss of peripheral vision and, eventually, central vision.

Symptoms of Retinitis Pigmentosa

The following are some symptoms of retinitis pigmentosa:

  • Night blindness: Struggle while seeing in low-light areas or at night. Often, night blindness is one of the first signs, starting in childhood or adolescence.
  • Peripheral vision loss: People with retinitis pigmentosa often have difficulty seeing objects to the side.
  • Tunnel vision: As retinitis pigmentosa progresses, the field of vision narrows, resembling a tunnel. This can severely limit the ability to see in broader spaces.
  • Reduced visual acuity: The sharpness of vision decreases over time, making it harder to perform tasks requiring detailed sight.

Quality of Life for Retinitis Pigmentosa Patients

For individuals with Retinitis Pigmentosa, daily activities become more challenging as vision worsens:

  • Navigating public spaces: Loss of peripheral vision makes it difficult to find objects, walk on uneven surfaces, or avoid falls, especially in low-light environments.
  • Driving: Night blindness and limited peripheral vision make driving unsafe, often leading to a loss of independence.
  • Work and education: Reading small text and seeing details can be difficult, requiring magnifiers or screen readers for work or study.
  • Social interactions: Night socialising, recognising faces, and reading body language become harder, leading to potential isolation.
  • Self-care: Tasks like cooking, cleaning, and grooming may require adaptations or assistance from others.
An optometrist is holding eye testing apparatus on a young woman's eyes.

Treatment Options for Retinitis Pigmentosa

There is no cure for retinitis pigmentosa, but treatment focuses on managing symptoms and slowing disease progression. However, there are ways to manage eye complications, including the following:

  • Retinitis pigmentosa patients may develop macular edema, leading to vision loss. Medications can help reduce the swelling and improve vision.
  • Additionally, cataracts, which can develop earlier in retinitis pigmentosa patients, can be treated with cataract surgery to restore clearer vision.

Retinal Implants

The ‘Argus II’ retinal prosthesis is a helpful device for blind people due to retinitis pigmentosa. This system involves implanting electrodes on the retina while a camera worn by the patient captures images. These images are then converted into electrical signals that stimulate the retina. Although retinal implants do not fully restore vision, they can provide visual clues that assist with navigation and daily activities.

Nutritional Supplements

Multivitamins, including antioxidants, are sometimes used to manage retinitis pigmentosa and slow its progression.

Low Vision Aids and Technology

Devices such as magnifying glasses, screen readers, and specialised software can help retinitis pigmentosa patients use their remaining vision more effectively.

Adaptive Strategies

The following strategies are helpful for people with retinitis pigmentosa:

  • Orientation and mobility training: People with retinitis pigmentosa can benefit from training that teaches them how to navigate spaces safely.
  • Emotional support and counselling: Counselling can assist retinitis pigmentosa patients in adjusting to changes in their vision, offering emotional support during this process.

LumiLab guides, webpages, and articles discussing optometry and ophthalmology are intended only for educational and informative purposes and do not serve as medical or professional advice.

The information presented, including but not limited to text, graphics, images, and other material, is for informational purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician, optician, or other health care professional if you have questions about your eye health or vision.

Stock images by Freepik – www.freepik.com, Stair images by LumiLab

Download this Ophthalmology & Optometry Information Guide

Understanding Diabetic Retinopathy: Ophthalmology & Optometry Information Guide

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
A woman wearing eye testing apparatus.

Understanding Diabetic Retinopathy

Prolonged elevated blood sugar levels in diabetes can cause several health conditions. Excess sugar can damage the blood vessels, nerves, and organs. At the same time, most people are now aware that diabetes can cause heart disease and kidney damage. However, it is essential to understand that diabetes can increase the risk of serious diabetic eye disease.

A view looking down a fire-isolated staircase, viewed by a person with advanced diabetic retinopathy.

Diabetic retinopathy

Diabetic retinopathy is a disorder that occurs when the blood vessels in the eye’s retina are damaged. The retina is the light-sensitive tissue at the back of the eye and contains many tiny blood vessels.

These vessels supply oxygen and nutrients to the retina. In diabetic retinopathy, these blood vessels can become weakened, leaky, or blocked. This damage can cause blood to leak into the retina. As a result, the retina cannot function properly, leading to vision problems like blurred vision or even vision loss. Over time, if untreated, diabetic retinopathy can lead to permanent vision loss.

Symptoms

Some of the most common symptoms of diabetic retinopathy include:

  • Blurry vision
  • Dark spots or floaters
  • Difficulty seeing in dim light area
  • Faded colours
  • Vision loss

Risk factors

Several factors can increase the risk of developing diabetic retinopathy:

  • Duration of diabetes: The longer someone has poor blood sugar control, the higher the risk of developing diabetic retinopathy. It usually develops after several years of poorly controlled blood sugar levels.
  • Age: People over the age of 40 may be at greater risk.
  • High blood pressure and elevated cholesterol levels can damage blood vessels, worsening retinopathy.
  • Pregnancy: Women with diabetes who are pregnant, particularly with uncontrolled blood sugar, are at higher risk.
  • Smoking can worsen blood vessel damage.

Regular eye exams and good management of blood sugar levels are crucial in reducing the risk of diabetic retinopathy.

Avoiding Diabetic Retinopathy: 4 Key Steps

If you have already been diagnosed with diabetes, adopting the following strategies can help you manage your condition and prevent or slow the progression of diabetic retinopathy:

  • Routine eye examinations: It is crucial to schedule regular eye exams at least once a year, or as advised by your ophthalmologist, to detect early signs of diabetic retinopathy.
  • Monitor blood glucose, blood pressure & cholesterol: Effective management plays a key role in reducing the risk and progression of this condition.
  • Follow a diabetic diet, exercise regularly & quit smoking: Follow a diabetic diet, maintain regular physical activity, and avoid smoking to enhance overall health and minimise complications.
  • Adhere to prescribed medications: Follow your healthcare provider’s instructions to manage diabetes effectively.

Treatment

You may need treatment for diabetic retinopathy only in its advanced stages when your vision is at risk. The treatment options include:

  • Laser treatment: Used to treat maculopathy and reduce the growth of new blood vessels.
  • Eye injections and steroid eye implants: Eye injections are used when the macula is affected, and if they are not effective, steroid eye implants may be considered
  • Eye surgery: Performed when laser treatment is not possible.

LumiLab guides, webpages, and articles discussing optometry and ophthalmology are intended only for educational and informative purposes and do not serve as medical or professional advice. The information presented, including but not limited to text, graphics, images, and other material, is for informational purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment.

Always consult your physician, optician, or other health care professional if you have questions about your eye health or vision.

Stock image by Freepik – http://www.freepik.com, stair images by LumiLab

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Inclusive Colouring Books

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
A blind bear is crossing the road with a friend and using a long cane as they walk through the pedestrian crossing

LumiLab is proud to make a range of children’s colouring books and colouring sheets available in our online store. These are currently a free digital download.

Each includes colouring sheets with cute kawaii animals.

Print these at A4 and keep the little ones entertained.

Inclusion, awareness and normalising disability can begin at a young age.

With accessible themes to help promote accessibility and inclusion.

Screen image from the LumiLab website showing lots of different line drawings with cute kawaii style animals
Screen image from the LumiLab website showing lots of different line drawings with cute kawaii style animals

Understanding Glaucoma – Protect Your Sight: Ophthalmology & Optometry Information Guide

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
A person sitting in a chair with an eye test device.

Understanding Glaucoma: Protect Your Sight

What is glaucoma?

Glaucoma is a set of diseases that affect the optic nerve, which relays images from the eye to the brain. The optic nerve is like a cable that carries visual information from the eye to the brain, allowing us to see.

Intermediate glaucoma vision compared to normal vision, looking up a fire exit stairway

The main types of glaucoma are:

  • Open-Angle Glaucoma
  • Angle-Closure Glaucoma
  • Normal-Tension Glaucoma
  • Congenital Glaucoma

These are further divided into categories according to the signs and disease severity.

Open-angle glaucoma, the more prevalent type, develops if the drainage channel in the eye becomes clogged and the pressure in the eye (intraocular pressure) rises. This pressure can slowly damage the optic nerve, thus affecting a person’s vision.

Silent thief

In the early stages of glaucoma, there are no noticeable symptoms. This disease progresses gradually and causes painless damage to the optic nerve. The patient may only notice a loss of vision in the final stage, making it a “silent thief” of sight. If left without treatment, glaucoma is also known to have a permanent effect on vision. Regular eye exams can help detect it at the early stages.

Primary open-angle glaucoma is the most common form of glaucomatous disease, which is one of the leading causes of blindness in the world. Prevention is the only strategy for addressing it, so knowing more about the condition is vital.

Symptoms and risk factors

Besides, the problem with glaucoma is that there could be no initial signs showing that you have the disease. With the progression of the disease, your side vision (peripheral vision) starts deteriorating, and it feels like looking through a tunnel, as shown in the picture below.

This means that you may have difficulty seeing objects to the side, above, and below your central field of vision. There are also later stages, which may, in addition, involve central vision, and you may lose complete, untreatable vision loss.

Risk factors

People at higher risk for glaucoma include:

  • Those over 60 years old
  • Family history of glaucoma.
  • Asians and African ethnicity are at higher risk, especially angle closure glaucoma.
  • Those who are suffering from high intraocular pressure or have other diseases, such as diabetes or hypertension.
  • Poor blood circulation, eye injuries, and people with thin cornea.

Diagnosis and Treatment

This disease can be detected during a comprehensive eye examination, in which the examiner may perform specific tests, and medical history plays a crucial role.

Some of the tests include:

  • Tonometry: where the examiner measures the eye pressure, called intraocular pressure.
  • Pachymetry: This test measures the thickness of the cornea.
  • Perimetry: This is the analysis of your visual fields.
  • Goniometry: The examiner looks at the drainage angle of your eye to see if it is closed.
  • Fundus Examination: Your examiner looks for any damage to the optic nerve.

Although the disease is virtually untreatable, the treatment’s purpose is to save residual vision by controlling the progress of the disease.

Your ophthalmologist can suggest eye drops, laser treatment, or surgery according to the severity of the disease.

Remember, early detection is key. Regular eye check-ups can help safeguard your vision if you are at risk. By staying proactive and informed, you can take control of your eye health and prevent the progression of glaucoma.

LumiLab guides, webpages, and articles discussing optometry and ophthalmology are intended only for educational and informative purposes and do not serve as medical or professional advice.

The information presented, including but not limited to text, graphics, images, and other material, is for informational purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician, optician, or other health care professional if you have questions about your eye health or vision.

Stock image by Freepik – http://www.freepik.com. Stair images by LumiLab

Download this Ophthalmology & Optometry Information Guide

How Surface Glare in Public Spaces Affects People: Ophthalmology & Optometry Information Guide

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
A reflection from a glass window of buildings and people walking past the glass.

How Surface Glare in Public Spaces Affects People With Eye Conditions

Day by day, when you move throughout a place, you may not even begin to wonder about the sleekness of a polished floor or the reflection of a glass window. However, this surface glare poses real problems for people with particular eye ailments.

Very shiny surfaces are uncomfortable and might cause additional navigation issues within the premises. It might be helpful to closely examine how this glare affects people with different eye pathologies.

Surface light can also be a problem for glaucoma patients, for instance. This is usually a condition of the optic nerve, and people often find themselves oversensitive to light.

Anything that shimmers or shines, from a shiny floor to sunlight on a window or the wall, could be abrasive to our eyes and may cause discomfort and eye strain. It takes effort for people to concentrate, and they can end up overwhelmed and lost in a setting of public squares.

In the same way, people with cataracts face problems with glare as well. Since a cataract impairs the lens of the eye and causes it to become cloudy, glaring or bright lights further exaggerate the visual impairment.

Reducing glare on surfaces is particularly important in places such as shopping centres or airports when intensive illumination and polished reflections are typical for such locations.

Thus, people with macular degeneration, those who have lost centre vision, have some difficulty with glare. This condition can limit one’s ability to distinguish faces, signs, or any other minute features in well-lit areas or areas full of reflections.

Flashing light and shade created by linear illumination might influence view perception and thus make vision unclear during activities such as reading or walking.

A tall blind man is standing next to a lady, who is staring at him and smiling, inside a lift car.

Such minor ailments like retinitis pigmentosa or diabetes generated in the retina may indicate difficulties in how the individual deals with glare. For instance, the brightness could become excessive to limit pedestrian visibility of objects or pass through crowded areas.

So, what can we do to help? Eliminating glare is one basic idea that can effectively reduce such challenging designs. Lustre, glossy prints, and bright lighting virtually double the discomfort level felt by people with Irlen symptoms.

The effect of glare on different eye conditions can prevent individuals from going out and moving around more safely and easily. The awareness of glare can help us make public spaces accessible to all.

LumiLab guides, webpages, and articles discussing optometry and ophthalmology are intended only for educational and informative purposes and do not serve as medical or professional advice.

The information presented, including but not limited to text, graphics, images, and other material, is for informational purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment.

Always consult your physician, optician, or other health care professional if you have questions about your eye health or vision.

Stock images by Freepik – http://www.freepik.com

Download this Ophthalmology & Optometry Information Guide

Red Eye Risks and Precautionary Measures: Ophthalmology & Optometry Information Guide

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
A close up of a young woman using eye drops.

Red Eye: Risks and Precautionary Measures

There are several blood vessels located on the different surfaces of the eyes. Red eyes or bloodshot eyes occur when these vessels become dilated or irritated, causing a reddish appearance to the eyes.

This expansion of the blood vessels, known as vasodilation, makes the whitish portion of the eye (the sclera) appear red. In some cases, the irritation may cause individual blood vessels to become more visible. In more severe situations, these blood vessels can rupture, causing blood to leak into the eye, resulting in noticeable redness or a subconjunctival haemorrhage.

Bloodshot eyes indicate several health issues, some of which may be mild. It can indicate some serious ophthalmic diseases or conditions, such as glaucoma, that may require immediate treatment, which is why the red eye should never be ignored.

Common symptoms and causes of red eye

Common symptoms of red eyes include visible redness in the white part of the eye, often accompanied by irritation, dryness, or itching. Other symptoms may include discharge, swelling, and sensitivity to light, depending on the underlying cause.

  • Pollution and smoke: Exposure to smoke and pollution irritates the eyes, causing inflammation and redness.
  • Dry air, wind, and dust: Dry environments and wind/dust can dehydrate the eyes, leading to irritation and redness.
  • Infections (Conjunctivitis & Blepharitis): Infections like conjunctivitis and blepharitis cause swelling, discharge, and red eyes.
  • Allergies: Allergic reactions caused by pollen, animal fur, and dust often result in red, itchy eyes.
  • Eye strain and fatigue: Excessive screen time or lack of sleep causes eye strain, leading to dilated blood vessels and redness.
  • Contact lenses: improperly fitted contact lenses or wearing them too long can irritate the eyes and cause redness.
  • Chemical exposure: Harsh chemicals can irritate the eyes, causing inflammation and redness.

When to seek medical attention

You should seek medical attention for red eyes if:

  • The redness persists for more than 24-48 hours despite self-care measures or if you experience severe pain, blurred vision, or increased sensitivity to light.
  • There is significant discharge, swelling, or if the red eye follows an eye injury.
  • You have underlying eye conditions like glaucoma or uveitis, as untreated issues can lead to serious complications.

Complications of red eyes

Most cases of red eyes are not severe, but conditions that affect vision can impact daily activities. Untreated eye issues, such as infections, angle-closure glaucoma, or injuries, may cause permanent damage, potentially leading to vision loss.

How to prevent bloodshot eyes

Preventing red eyes involves staying hydrated, using lubricating eye drops, and wearing protective eyewear in smoky or dusty environments. Take regular screen breaks, clean contact lenses properly, and get enough sleep to avoid eye strain. Practising good hygiene and minimising exposure to allergens and irritants can also help keep your eyes healthy and free from redness.

Treatment

Cold compresses, cucumber slices, and artificial tears can help soothe red or irritated eyes. Staying hydrated and using a humidifier may also prevent dryness and further discomfort. If the redness persists or worsens or is accompanied by pain or changes in vision, it is crucial to consult an eye care professional for proper diagnosis and treatment.

A young woman is holding eye pads to her eyes.

LumiLab guides, webpages, and articles discussing optometry and ophthalmology are intended only for educational and informative purposes and do not serve as medical or professional advice.

The information presented, including but not limited to text, graphics, images, and other material, is for informational purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician, optician, or other health care professional if you have questions about your eye health or vision.

Stock images by Freepik – http://www.freepik.com

Download this Ophthalmology & Optometry Information Guide

Strabismus and its Management: Ophthalmology & Optometry Information Guide

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
A young woman is having an eye test with an optometrist holding testing apparatus on her eyes.

Strabismus and its Management

Strabismus occurs when the eyes are misaligned and point in different directions. It is a common vision issue in young children, affecting about 2 to 4 per cent of the young population worldwide. Early detection of strabismus in children is essential because the first few years are key for developing vision. Strabismus affects both the child’s appearance and their ability to see correctly.

Types of strabismus

There are different types of strabismus based on eye deviation from the primary position (straight-ahead position):

  • Esotropia (towards the nose)
  • Exotropia (away from the nose)
  • Hypertropia (upward)
  • Hypotropia (downward)

Binocular single vision

Binocular single vision (BSV) is the ability of both eyes and the brain to work as a team and create one clear image. The brain combines slightly different images of both eyes. This process is called stereopsis.

Stereopsis helps us accurately judge an object’s distance in 3D space, called depth perception. Depth perception is essential to interact with our environment and navigate effectively. As the eyes are misaligned in strabismus, this discoordination prevents binocular single vision. Individuals with strabismus may experience double vision or have difficulty judging distances.

Causes and Risk Factors of Strabismus

Strabismus may occur due to any of these:

  • Abnormal functioning of the brain, nerves, or the eye muscles.
  • Different health conditions, head trauma, and refractive errors.

Risk factors include:

  • A family history of strabismus
  • Premature birth
  • Developmental disorders like cerebral palsy.

Common Symptoms of Strabismus

Symptoms can vary in severity and may impact daily activities, making it essential to seek treatment if strabismus is suspected:

  • Cosmetic appearance: Visible misalignment of one or both eyes
  • Double vision: Seeing two images of a single object as the brain struggles to combine the images from each eye.
  • Depth perception: Difficulty estimating how far away things are.
  • Closing one eye: to avoid double vision.
  • Head Tilting or Turning: Tilting or turning the head to compensate for the eye misalignment.
  • Difficulty focusing: Problems with focusing on objects because the eyes are not aligned to focus together.
  • Eye strain or fatigue: Discomfort, tension, or tiredness from the constant effort required to maintain clear vision.

Treatment options

  • Eyeglasses are used to correct refractive errors and help reduce or manage strabismus, especially in accommodative types.
  • Eye patching: A patch is applied to the stronger eye to promote vision development in the weaker eye and improve overall eye coordination.
  • Prism glasses: Special lenses that bend light to help realign the eyes, commonly used to manage double vision and improve focus.
  • Vision therapy: A structured program of eye exercises to improve eye muscle strength, coordination, and binocular vision.
  • Botox injections: Botox temporarily weakens overactive eye muscles by helping to align the eyes for a period.
  • Surgical intervention: Surgery may be performed to adjust the position or tension of the eye muscles, providing long-term correction for significant misalignment.
  • Medication: Medications may be prescribed if strabismus is linked to underlying conditions, such as thyroid disorders or neurological issues.
A male optometrist is holding a pair of eye glasses frames and looking at them.

LumiLab guides, webpages, and articles discussing optometry and ophthalmology are intended only for educational and informative purposes and do not serve as medical or professional advice.

The information presented, including but not limited to text, graphics, images, and other material, is for informational purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment.

Always consult your physician, optician, or other health care professional if you have questions about your eye health or vision.

Stock images by Freepik – http://www.freepik.com

Download this Ophthalmology & Optometry Information Guide

Understanding Amblyopia The Silent Vision Problem: Ophthalmology & Optometry Information Guide

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
A young boy is being examined by an optometrist.

Understanding Amblyopia: The Silent Vision Problem

Amblyopia, often called “lazy eye,” is when one eye doesn’t develop normal vision. The brain favours one eye over the other, suppressing the vision in the weaker eye. This condition is common in children, but it can also affect adults. It can be treated effectively if caught early.

Amblyopia has a 2-3% prevalence in children worldwide. A child’s vision develops in the first few years of his life. Early detection and treating the underlying cause can help improve vision. If untreated, it can lead to permanent decreased vision in the affected eye.

What is Amblyopia?

Amblyopia occurs when the brain does not fully recognise the images received from the weaker eye and prefers the clearer images from the other eye. The brain starts to ignore the images from the weak eye. As a result, the vision in that eye does not develop as it should, which results in poor visual acuity. This condition can affect both distance and near vision.

Types of Amblyopia

There are several types of amblyopia, each caused by different underlying issues:

  • Strabismic Amblyopia: This is the most common type, caused by an imbalance in the eye muscles, leading to strabismus or misalignment of the eyes.
  • Refractive Amblyopia: This occurs when one eye has a higher degree of refractive error, such as near-sightedness, farsightedness, or astigmatism. An uncorrected refractive error can cause amblyopia, the most common type.
  • Deprivation Amblyopia: This type happens when something obstructs normal vision in one eye during early childhood, such as a cataract or other vision impairments.
A young girl is being examined by an optometrist.

Causes and Risk Factors

Amblyopia often develops during the critical period of visual development, usually from birth to around seven years old. The following factors increase the risk:

  • Strabismus: Misaligned eyes can prevent normal binocular vision, leading to amblyopia.
  • Anisometropia: A significant difference in refractive error. If one eye has significantly worse vision than the other, it may lead to amblyopia.
  • Eye diseases: Various conditions such as cataracts or ptosis can block vision and cause amblyopia.

Symptoms of Amblyopia

The symptoms of amblyopia can be hard to notice, especially in children who may not complain about their vision. However, parents and caregivers should look for signs such as:

  • Squinting or tilting the head: Children may try to compensate for the poor vision in one eye by squinting or tilting their head.
  • Difficulty with eye contact: The child might avoid using both eyes together.
  • Poor depth perception: Since the brain relies on both eyes working together, depth perception can be impaired.
  • Complaints of blurry vision: Children may complain of blurry or unclear vision, though this is often subtle.

Diagnosis and Treatment

Although amblyopia cannot always be prevented, a comprehensive eye exam with an optometrist or ophthalmologist and treatment of underlying conditions can help detect amblyopia at its early stages.

Treatment

The following can be effective treatments:

  • Corrective lenses: Glasses or contact lenses may be prescribed to correct refractive errors.
  • Patching: Covering the stronger eye with a patch forces the weaker eye to work harder and develop better vision.
  • Medication: Your doctor can suggest some eye drops.
  • Surgical intervention: In cases of strabismus, surgery may be required to align the eyes.

LumiLab guides, webpages, and articles discussing optometry and ophthalmology are intended only for educational and informative purposes and do not serve as medical or professional advice.

The information presented, including but not limited to text, graphics, images, and other material, is for informational purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment.

Always consult your physician, optician, or other health care professional if you have questions about your eye health or vision.

Stock images by Freepik – http://www.freepik.com

Download this Ophthalmology & Optometry Information Guide

Cataracts and the Quality of Life: Ophthalmology & Optometry Information Guide

Posted on by Lee Wilson, Access Consultant, Universal Design Consultant
An optometrist is inspection an older mans eyes.

Cataracts and the Quality of Life

Cataract is the clouding of the lens in the eyes. The eye’s lens is usually clear and helps focus light rays onto the retina. It is composed of proteins that are normally arranged clearly and organised. However, in cataracts, these proteins start to break down and clump together, causing the lens to become cloudy. This cloudiness prevents light from passing through the lens properly, leading to blurry or impaired vision.

Cataract is a common ophthalmic condition, and it is a leading cause of blindness globally, affecting about 24-30 million people. Cataracts, especially in old age, affect vision significantly and make it difficult to perform daily activities like watching movies, reading, driving, and recognising people’s faces.

Advanced cataract vision compared to normal vision, looking up a heritage style stairway

Risk factors

The following are significant risk factors:

  • Aging: Aging is the most common cause of cataracts. Cataracts typically develop slowly over time and may not significantly affect vision at first. Most people start to notice cataract symptoms in their 60s or 70s, but signs can begin earlier, especially in those with a family history or other risk factors. By the age of 80, more than half of people will have cataracts to some degree. The process is gradual, and the severity of symptoms varies with many people.
  • Another factor can also affect its progression.
  • Genetics: Family history
  • Injury: Eye injuries can lead to cataract formation.
  • Diabetes: High blood glucose level.
  • Prolonged UV Exposure: Extended exposure to sunlight.
  • Smoking
  • Medications (Long-term use of steroids)
  • Other eye conditions like glaucoma can increase the risk.

Symptoms of cataract

Some of the most common symptoms are:

  • Blurred or decreased vision
  • Difficulty seeing in dim light areas or at night
  • Increased sensitivity to light
  • Faded colours
  • Double vision

Treatment options

Cataracts are treatable, and various treatment options are available. We will discuss them as non-surgical and surgical. The treatment for cataracts depends on the severity of the condition and its impact on daily activities.

Non-surgical treatment: prescription aids

In the early stages of cataracts, you may feel decreased vision and contrast changes that can be corrected using prescription glasses or contact lenses. In severe vision loss, low vision aids, such as magnifiers or special lighting, can also assist with reading or close-up tasks. These solutions manage symptoms but do not halt the progression of cataracts.

When to opt for this approach: Prescription aids are suitable when cataracts are early and do not significantly impair daily functions.

Surgical treatment: cataract surgery

Surgical treatment is the only permanent solution for cataracts. During the procedure, the cloudy lens is removed and replaced with a clear artificial lens. This surgery is typically quick, safe, and offers rapid improvement in vision.

Surgery is recommended when cataracts begin to interfere with activities such as driving, reading, or watching TV or when other treatments no longer provide sufficient relief.

Living with cataracts before surgery

If you are not yet ready for cataract surgery, you can manage the condition through lifestyle adjustments and vision aids. These steps can significantly improve daily life and help maintain independence. Here are some strategies:

  • Using stronger lighting can reduce the impact of decreased contrast, especially when reading or doing close-up tasks.
  • Magnifying aids or handheld magnifiers can help with reading.
  • Anti-glare lenses are specialised lenses that reduce glare from headlights, sunlight, or indoor lighting.
  • Adjust your environment. A well-lit home helps you perform daily tasks safely.
  • Frequent eye check-ups with an eye doctor can help monitor the cataract’s progression and manage any vision changes.
  • Eat a nutrient-rich diet, quit smoking, manage and control your diabetes, and limit alcohol consumption.

LumiLab guides, webpages, and articles discussing optometry and ophthalmology are intended only for educational and informative purposes and do not serve as medical or professional advice.

The information presented, including but not limited to text, graphics, images, and other material, is for informational purposes and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician, optician, or other health care professional if you have questions about your eye health or vision.

Stock image by Freepik – http://www.freepik.com, stair images by LumiLab

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