astigmatism hct ii. astigmatism an abnormal shape or curvature of the cornea that causes blurred...
Post on 19-Jan-2018
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AstigmatismHCT II
Astigmatism
An abnormal shape or curvature of the cornea that causes blurred vision. ◦This causes light rays to focus on multiple
areas of the retina
Cover one eye and look at the chart. Then close the other eye and look at the chart again.
If some lines look grey, bold or blurred you may need your eyes checked.
Treatment
Eyeglass- lenses are shaped to counteract the shape of the cornea or lens that's causing blurred vision.
Contact lenses-All contact lenses rotate when a person blinks. "toric" lenses turn back to their normal position to treat astigmatism
Laser eye surgery (LASIK). the surgeon uses a laser to reshape the cornea so it can focus light rays better
Place yourself at approximately 1m from the screen. Cover one eye with your hand, without pressing on the lid, and take the test. Cover the other eye and begin the test again.
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