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Close-up of an eye

What is a cataract?

Cataracts are common and happen as we age. A cataract is a clouding of the lens in the eye, caused by a buildup of the eye’s natural protein. The buildup of protein changes the way the eye focuses light, therefore changing the color and clarity of vision.1

Cataracts begin for most of us between ages 40 and 50 and symptoms become apparent when we are between 60 and 70. Cataract treatment is a once in a lifetime opportunity to see better. 2

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Man taking a photograph with a camera

What causes cataracts?

The natural lens in your eye is made up of protein that starts to clump together and cloud the lens as you age.

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Cataracts symptoms

A common sign of cataracts is dull or cloudy vision. Find out more about these and other symptoms.

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Eye model showing the different parts of an eye

Types of eye conditions

Cataract surgery may allow you to address other eye conditions that impact the crispness and clarity of your vision in addition to cataracts.

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1American Optometric Association. Cataract. Accessed May 24, 2022.
2National Eye Institute. Cataracts. Accessed May 24, 2022..