This computerized test maps the curve of your cornea. It can show problems with your eye’s surface, such as swelling or scarring, or conditions such as astigmatism or diseases like keratoconus.
A hard lens produces better vision because it masks the corneal distortions, mimicking a new smooth optical surface to focus light. With a soft contact lens, astigmatism or distortion is often not ...
The person may still have astigmatism (denoted by cylinder ... recommends that children follow a different schedule to test for vision changes and to spot any early signs of eye problems: birth ...
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