List of Diseases That Cause Cataracts and How They Affect Your Eyes

Cataracts are often associated with ageing, but several underlying medical conditions can also contribute to their development. At JL Eye Specialists, we frequently see patients who are surprised to learn that chronic diseases, inflammatory conditions, and metabolic disorders may increase the risk of cataracts earlier in life. Understanding the list of diseases that cause cataracts is important not only for protecting long-term vision, but also for recognising when changes in eyesight may signal a broader health concern.

While cataracts typically develop gradually, the impact on daily life can become significant over time. Blurred vision, difficulty driving at night, faded colours, and increased sensitivity to glare may all affect visual clarity and independence. In some cases, the progression may be accelerated by systemic illnesses or long-term medication use. Early assessment through a comprehensive cataract eye examination can help detect changes before vision becomes severely impaired.

Key Takeaways

• Several chronic medical conditions, including diabetes and autoimmune diseases, may increase the risk of cataract formation.
• Certain infections, inflammatory disorders, and genetic conditions can contribute to cataracts developing earlier than expected.
• Cataracts linked to underlying diseases may progress differently depending on the patient’s overall eye and systemic health.
• A comprehensive cataract eye examination can help identify the severity of lens changes and guide appropriate treatment decisions.
• Timely consultation with a cataract specialist may help preserve visual function and improve quality of life through personalised care and cataract surgery when necessary.

Understanding How Cataracts Develop

The eye’s natural lens is normally clear and flexible, allowing light to pass through and focus properly on the retina. Cataracts occur when proteins within the lens begin to break down and clump together, creating cloudy areas that interfere with vision.

Although age remains the most common cause, other health conditions may alter the lens structure through inflammation, oxidative stress, blood sugar fluctuations, or impaired metabolism. In some patients, cataracts may appear at a younger age or progress more rapidly because of these underlying medical factors.

Vision changes associated with cataracts can include:

• Blurred or cloudy vision
• Difficulty seeing in dim lighting
• Increased glare from headlights or sunlight
• Frequent prescription changes
• Double vision in one eye
• Colours appearing dull or yellowed

Because these symptoms may overlap with other eye conditions, a proper evaluation at an eye specialist clinic is essential.

List of Diseases That Cause Cataracts

Several systemic and ocular diseases have been associated with cataract formation. Some directly affect the lens, while others increase inflammation or disrupt the eye’s natural balance over time.

Diabetes Mellitus

Diabetes is one of the most recognised conditions associated with cataracts. Elevated blood sugar levels can cause changes within the lens, leading to swelling and protein damage that accelerate clouding.

People with diabetes may develop cataracts at a younger age compared to those without the condition. Poorly controlled diabetes may also increase the risk of diabetic retinopathy, creating additional vision complications.

Why Diabetes Increases Cataract Risk

Persistently high glucose levels can cause sorbitol to accumulate within the lens. This creates osmotic stress, which affects lens clarity and structure.

Symptoms May Progress Faster

Some diabetic patients notice more rapid changes in vision, especially if blood sugar levels fluctuate significantly over time.

Importance of Regular Eye Monitoring

Routine eye examinations are especially important for diabetic patients, as cataracts may develop alongside retinal complications that require treatment.

Hypertension and Cardiovascular Disease

High blood pressure and vascular disease may contribute indirectly to cataract development by affecting blood circulation and increasing oxidative stress throughout the body.

Reduced blood flow can impair nutrient delivery to the eye’s structures, including the lens. Certain medications used in cardiovascular management may also contribute to long-term ocular changes in some individuals.

Although the relationship is less direct than diabetes, growing evidence suggests that cardiovascular and metabolic health may contribute to cataract development through oxidative stress, vascular dysfunction, and systemic inflammatory changes affecting the lens. 

Autoimmune Diseases

Autoimmune conditions can increase cataract risk through chronic inflammation and long-term corticosteroid use.

Common autoimmune diseases linked to cataracts include:

Autoimmune Condition	How It Affects the Eyes	Cataract Risk Factors
Rheumatoid arthritis	Chronic inflammation and steroid treatment	Long-term corticosteroid exposure
Lupus	Inflammatory damage affecting multiple organs	Steroid-related cataract formation
Psoriasis	Systemic inflammation	Immune-related ocular inflammation
Juvenile idiopathic arthritis	Eye inflammation in younger patients	Increased risk of early cataracts
Multiple sclerosis	Neurological and inflammatory involvement	Steroid therapy complications

Patients with autoimmune disorders may require closer ophthalmic monitoring, especially when long-term steroid treatment is involved.

Uveitis and Chronic Eye Inflammation

Uveitis refers to inflammation within the eye and is a significant cause of secondary cataracts.

Inflammation may damage the lens directly, while repeated steroid treatment can further increase cataract formation. In some patients, cataracts caused by uveitis may develop relatively quickly and become visually significant within a shorter period.

Posterior Subcapsular Cataracts

This type of cataract is commonly associated with steroid use and inflammatory eye disease. It tends to affect near vision and glare sensitivity earlier than other cataract types.

Importance of Inflammation Control

Managing the underlying inflammation is often necessary before cataract surgery can be safely performed.

Long-Term Monitoring

Patients with recurrent uveitis may require ongoing review from both a cataract specialist and other medical professionals involved in managing the underlying disease.

Atopic Dermatitis and Severe Allergic Conditions

Severe eczema and chronic allergic diseases have also been linked to cataracts, particularly in younger patients.

Frequent eye rubbing, chronic inflammation, and steroid use may all contribute to lens changes over time. Some patients with severe atopic dermatitis develop characteristic anterior or posterior subcapsular cataracts.

While less common than diabetic cataracts, these cases demonstrate how systemic inflammatory conditions can affect long-term eye health.

Infectious Diseases That May Lead to Cataracts

Certain infections may damage the lens directly or trigger inflammatory responses that increase cataract risk.

Examples include:

• Rubella infection during pregnancy, which may cause congenital cataracts in infants
• Cytomegalovirus infections affecting ocular tissues
• Toxoplasmosis associated with inflammation inside the eye
• Herpes simplex infections involving the cornea and internal eye structures

Congenital cataracts linked to infections may affect visual development in children and often require early intervention.

Genetic and Metabolic Disorders

Some inherited conditions may predispose individuals to earlier cataract development.

These include:

Galactosaemia

This rare metabolic disorder affects how the body processes galactose, leading to cataract formation in infancy or early childhood.

Myotonic Dystrophy

Patients with this genetic condition may develop distinctive cataracts earlier in adulthood.

Wilson’s Disease

Abnormal copper accumulation associated with Wilson’s disease can affect various organs, including the eyes.

Down Syndrome

Children and adults with Down syndrome may have a higher incidence of cataracts compared to the general population.

Although these conditions are less common, they highlight the importance of comprehensive medical evaluation when cataracts develop unusually early.

Skin Disorders and Eye Health

Several dermatological conditions may affect the eyes more than many people realise. Disorders involving chronic inflammation or connective tissue abnormalities may increase the likelihood of cataracts developing over time.

Patients with severe rosacea, eczema, or inherited skin disorders sometimes experience accompanying ocular complications that require ophthalmic care. In these situations, collaboration between dermatologists and an eye specialist clinic may help support long-term visual health.

Medications That May Contribute to Cataracts

In some cases, the disease itself is not the only factor involved. Long-term medication use may also increase cataract risk.

The most well-known example is corticosteroids, which may be prescribed for:

• Asthma
• Autoimmune diseases
• Chronic skin conditions
• Organ transplant management
• Inflammatory bowel disease

Steroids may be taken orally, inhaled, injected, or used as eye drops. Prolonged exposure may increase the likelihood of posterior subcapsular cataracts.

Other medications occasionally associated with cataract formation include certain antipsychotics and older glaucoma medications, although the overall risk varies between individuals.

When to See a Cataract Specialist

Many people delay seeking help because cataracts often develop gradually. However, worsening visual symptoms should not be ignored, particularly in individuals with chronic medical conditions.

You should consider seeing a cataract specialist if you experience:

• Increasing difficulty reading or driving
• Glare sensitivity affecting night vision
• Frequent prescription changes
• Cloudy or dim vision
• Persistent Blurring of Vision 
• Reduced contrast or colour perception

A comprehensive cataract eye examination typically includes visual acuity testing, lens assessment, retinal evaluation, and imaging where necessary.

Importantly, some symptoms attributed to cataracts may actually be related to retinal disease, glaucoma, or other eye conditions. Accurate diagnosis is essential before treatment decisions are made.

Protecting Long-Term Vision Through Early Eye Care

Many diseases that cause cataracts are chronic conditions requiring lifelong management. While cataracts themselves are treatable, preserving overall eye health often depends on early detection and consistent monitoring.

At JL Eye Specialists, we believe that informed patients are better equipped to protect their vision over time. Whether cataracts develop as part of ageing or alongside another medical condition, timely assessment at an experienced eye specialist clinic can help identify appropriate treatment options and support better visual outcomes.

If you have noticed persistent changes in your vision or have an existing health condition associated with cataracts, a detailed cataract eye examination may provide clarity on the underlying cause and whether cataract surgery should be considered.

Frequently Asked Questions

Can cataracts caused by disease be prevented?

Not all cataracts can be prevented, especially when genetic or age-related factors are involved. However, managing chronic medical conditions effectively, attending regular eye examinations, and reducing unnecessary steroid exposure may help lower the risk or slow progression.

Do all diabetic patients eventually develop cataracts?

Not necessarily. While diabetes increases the likelihood of cataract formation, the severity and timing vary between individuals. Good blood sugar control and regular monitoring may help reduce complications affecting the eyes.

Are cataracts from autoimmune diseases more difficult to treat?

Treatment can sometimes be more complex if significant inflammation is present. In these situations, inflammation usually needs to be stabilised before cataract surgery is performed to support safer outcomes.

Can younger adults develop cataracts because of medical conditions?

Yes. Certain diseases, medications, inherited disorders, and inflammatory conditions may lead to cataracts developing earlier than expected, even in younger adults.

How often should someone with chronic illness have an eye examination?

The frequency depends on the specific condition and individual risk factors. Many patients with diabetes, autoimmune disease, or long-term steroid use benefit from regular reviews at an eye specialist clinic to monitor for cataracts and other ocular complications.