Which abbreviation is used for left eye?

The abbreviation used for the left eye is "O.S." This terminology comes from Latin, where "Oculus Sinister" means left eye. In medical practice, especially in ophthalmology, knowing these abbreviations is crucial for accurately prescribing and administering medications.

"O.U." stands for both eyes (Oculus Uterque), "O.D." refers to the right eye (Oculus Dexter), and "NPO" means nothing by mouth (from the Latin "Nil Per Os"), which is unrelated to eye care. Understanding these distinctions ensures that patients receive the correct treatment for their specific conditions, highlighting the importance of precise communication in healthcare settings.