Cataracts develop when the eye’s natural lens becomes cloudy. The changes are usually gradual, and many people first notice cataracts as a subtle decline in the quality of their vision rather than a sudden loss of sight.
Common Cataract Symptoms
- Blurred, hazy, or cloudy vision
- Difficulty seeing clearly at night
- Glare or halos around lights
- Increasing sensitivity to bright light
- Colors appearing faded or less vivid
- Needing brighter light to read
- Frequent changes in glasses prescription
- Difficulty with driving, especially at night
What Does a Cataract Look Like?
A cataract is a clouding of the natural lens inside the eye. Cataracts can occur in different parts of the lens and can affect vision in different ways. The appearance of a cataract does not always tell you how much it is affecting your day-to-day vision.
How Are Cataracts Diagnosed?
An ophthalmologist or optometrist can diagnose a cataract during a comprehensive eye examination. The evaluation may include visual acuity testing, refraction, slit-lamp examination, dilation, intraocular pressure measurement, and additional testing when appropriate.
When Should You Get Your Eyes Checked?
Do not wait for severe vision loss before having an eye examination. Changes in vision can have causes other than cataracts, and a comprehensive examination can identify conditions involving the cornea, retina, optic nerve, or other structures of the eye.
Do Cataracts Always Need Surgery?
Not necessarily. Cataract surgery is generally considered when the cataract causes enough visual difficulty to interfere with activities that matter to you. The decision is based on symptoms and functional needs, not simply on how a cataract looks.
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