Washington State Veterinary Medication Clerk Practice Test

Which abbreviation indicates dosing for the left eye only?

OD OS OU AU

Correct Answer:

Explanation:

Dosing abbreviations for the eyes are based on Latin terms. Oculus dexter (OD) is the right eye, and oculus sinister (OS) is the left eye. Oculus uterque (OU) means both eyes. Since the instruction is for the left eye only, the correct shorthand is OS. It’s the standard way to indicate treatment or dosing to the left eye. AU isn’t the typical ophthalmic shorthand for a single eye and isn’t used to specify left-eye dosing in most eye medication records.

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