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Home > Health & Wellness > Vision   »   How to understand eyesight number

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Old May 2, 2007, 07:36 AM
r shaikh
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How to understand eyesight number
What does this mean in terms of eyesight - CYL -R--2.25, L - -2.75

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Old Mar 16, 2008, 12:45 AM   #2  
ChihuahuaMomma
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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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Old Mar 18, 2008, 11:13 PM   #3  
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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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