Contact lenses prescription - what is OS and OD?

OS is always associated with the left eye and OD with the right eye. I am just wondering if it means anything more than left eye and right eye in doctor speak.

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Answers:
"oculus sinister." Latin for "left eye."
"oculus dexter" which is Latin for the right eye.

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OD also has connotations with overdose;
Source(s):
Stedman's Medical Dictionary.

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OD is RIGHT EYE
OS is LEFT EYE
Source(s):
http://www.actionlens.com

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Contact lenses prescription - what is OS and OD?

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