Route
OS
Left eye
What OS stands for
OS is a medical abbreviation for left eye - written out in full as “Oculus sinister (left eye)”. TermDecode files it under route abbreviations.
RouteFlagged high riskSourced
Risk
Can be mistaken for AS (left ear)
Safer Alternative
Write "left eye"
Seen in context
OS misread as AS
Sources
The risk description and safer alternative above are reproduced from these published lists.
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