Vision Care Glossary

Complete Eye Care Dictionary

Learning about your eye health can be confusing and complicated. To simplify things for you, Northern Illinois Optical Co. has created its own vision care glossary. 

Browse through our comprehensive library of vision-related information that'll help you better understand how your vision works and more. Call us today.

Astigmatism

Astigmatism is an eye condition where the eye cannot focus light uniformly in all directions resulting from an irregular curvature of the cornea, the crystalline lens, or the eye itself. It results in mild to moderately blurred vision or eyestrain.

Cataracts

A cataract is a clouding of the crystalline lens of the eye that makes it hard for light to pass through and for the eye to focus properly. 

In a normal eye, the crystalline lens is almost transparent, but injury, age, or disease can cause the lens to eventually lose its clarity. When the lens becomes opaque, it is called a cataract. It can be treated by surgery.

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