Similar to CST

non rep. - non repetatur - no repeats
NS - normal saline 0.9%
o.p.d. - once per day
o.s. - oculus sinister - left eye
o.u. - oculus uterque - both eyes
od - oculus dexter - right eye
od - omne in die - every day/once daily preferred to qd in the UK[3]

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