Contact Lens Prescription Od Os

contact lens
A contact lens (also known simply as a contact) is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye.
A thin lens, made of flexible or rigid plastic, that is placed directly on to the eye to correct vision, used as an alternative to spectacles, or, if coloured, to change one's eye color cosmetically
A thin plastic lens placed directly on the surface of the eye to correct visual defects
contact: a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication

prescription
written instructions for an optician on the lenses for a given person
directions prescribed beforehand; the action of prescribing authoritative rules or directions; "I tried to follow her prescription for success"
The action of prescribing a medicine or treatment
A medicine or remedy that is prescribed
An instruction written by a medical practitioner that authorizes a patient to be provided a medicine or treatment
prescription(a): available only with a doctor's written prescription; "a prescription drug"

od os
OD stands for oculus dexter and indicates the right eye, and OS stands for oculus sinister and indicates the left eye.