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O

Term Definition
Obstetrician

A physician who treats women during pregnancy and parturition.

Ophthalmologist

A physician who specializes in the treatment of disorders of the eye; an oculist.

Optic nerve damage

Any damage either structurally or functionally to the eye that may result in permanent visual loss.

Orofacial clefting

See cleft lip and cleft palate

Orthodontics

The branch of dentistry which deals with the prevention and correction of irregularities of the teeth.

Orthodontist

A dentist who specializes in orthodontics.