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How to understand eyesight number

Asked May 2, 2007, 08:36 AM — 2 Answers
What does this mean in terms of eyesight - CYL -R--2.25, L - -2.75

2 Answers
ChihuahuaMomma's Avatar
ChihuahuaMomma Posts: 7,412, Reputation: 3154
Vision Expert
 
#2

Mar 16, 2008, 01:45 AM


Cyl is the cylinder. If its minus it means you are nearsighted, if its plus you are farsighted.

R or OD means right eye, L or OS means left.

-2.25 is your prescription for your right eye.
-2.75 is your prescription for your left eye.
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supriya _82's Avatar
supriya _82 Posts: 241, Reputation: 135
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#3

Mar 19, 2008, 12:13 AM
ChihuahuaMomma is right. A bit of extra info - the unit of the numbers is diopters (eg -2.25 diopters) Though not mentioned it is universally applicable.
Also since you have Cylindical correction, the prescription should also mention the axis which is not mentioned on yours.
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