Cataracts
Cataracts are a clouding of the eye's natural lens, leading to blurry or dimmed vision. It is a progressive condition common in older adults that can eventually interfere with daily activities like driving or reading.
Overview
Cataracts are a clouding of the eye's natural lens, leading to blurry or dimmed vision. It is a progressive condition common in older adults that can eventually interfere with daily activities like driving or reading.
Understand this condition
The eye's lens is made mostly of water and protein arranged to keep it clear. As we age, these proteins begin to clump together, clouding small areas of the lens. This prevents light from focusing clearly on the retina at the back of the eye.
Why it happens
The biological cause is the breakdown and clumping of structural proteins within the lens. This process usually progresses slowly over years, triggered by oxidative stress and environmental damage. As the clumps grow larger, they scatter light and prevent it from reaching the retina.
Real-world scenarios
- •This often appears as difficulty driving at night due to glare.
- •People may notice colors looking faded, yellowed, or less vibrant.
- •This often appears as needing much brighter light to read comfortably.
- •People may notice frequent changes in their eyeglass prescription.
Common vs serious explanations
- •Natural age-related changes to eye proteins
- •History of excessive sun exposure without protection
- •Normal wear and tear of the lens over decades
- Secondary glaucoma caused by a maturing cataract
- Retinal detachment masquerading as vision clouding
- Macular degeneration occurring alongside lens changes
Symptoms
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Causes
- •Aging-related proteins clumping in the lens
- •Eye injury or trauma
- •Genetic disorders
- •Complications from previous eye surgery
Risk factors
- •Increasing age
- •Diabetes
- •Excessive exposure to sunlight (UV light)
- •Long-term use of corticosteroid medications
- •Smoking
How it progresses
3 stages- OnsetSymptoms appear, often triggered by a known cause.Often missed
- Active phaseSymptoms peak; self-care or short treatment usually helps.
- ResolutionSymptoms ease over days to weeks with proper care.
How it's diagnosed
- •Visual acuity test (eye chart)
- •Slit-lamp exam
- •Retinal exam
- •Applanation tonometry
Treatment options
General educational information only — no dosage advice. Always follow guidance from a qualified clinician.
- •Early-stage prescription glasses
- •Anti-glare sunglass coatings
- •Surgical lens replacement (phacoemulsification)
- •Intraocular lens (IOL) implants
- •Use brighter lights for reading
- •Wear anti-glare sunglasses outdoors
- •Use magnifying lenses for close work
- •Keep eyeglass prescriptions up to date
Complications
- •Reduced quality of life
- •Worsening symptoms over time
- •Recurrence of cataracts
Prevention
- •Maintain a healthy lifestyle
- •See a clinician for routine check-ups
When to seek help
- •Symptoms persist beyond a few days
- •Symptoms interfere with daily activities
- •New or worsening symptoms appear
- •Concerning changes related to cataracts
- Sudden loss of vision
- Severe eye pain
- Sudden onset of flashes of light or floaters
- Double vision in one eye
In any emergency, call your local emergency number or go to the nearest emergency department.
Real-world questions
- ›Can Cataracts cause headaches?
- ›Is Cataracts reversible?
- ›How quickly does Cataracts progress?
- ›Is Cataracts hereditary?
- ›Can Cataracts be prevented?
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Frequently asked questions
Possible causes of Cataracts include Aging-related proteins clumping in the lens, Eye injury or trauma, Genetic disorders, Complications from previous eye surgery.
Cataracts is generally moderate, but severity can vary. Seek care if symptoms are severe or persistent.
Duration varies between individuals. Many cases improve with appropriate care, while others may persist longer and require ongoing management.
Some milder cases may improve with rest and self-care. If symptoms persist or worsen, consult a healthcare professional.
Consider seeing a clinician if symptoms are severe, persistent, worsening, or if you have any concerns related to general.
Sources
Information based on general medical references such as:
Last reviewed: May 2026