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O (Ocolar to Overconvergence)

Ocolar

Friday, January 15th, 2010

Pertaining to the eye.

Onchocerciasis

Friday, January 15th, 2010

River blindness. Caused by the parasitic worm onchocerca. Infection is as a result of being bitten by the buffalo gnat which is found in some fast flowing rivers in Africa and Central America. (more…)

Open Angle Glaucoma

Friday, January 15th, 2010

See glaucoma.

Optic Disc

Friday, January 15th, 2010

Blind spot. Circular area of the retina where the optic nerve enters the eye. Contains no cells involved with vision.

Optic Lobe

Friday, January 15th, 2010

See superior colliculus.

Optic Nerve

Friday, January 15th, 2010

Links the eye to the brain. It transmits the impulses created in the retina to the brain where they are transformed into images thus creating vision.

Optic Neuritis

Friday, January 15th, 2010

Inflammation of the optic nerve causing reduced vision and making the eye uncomfortable when it moves.

Optic Neuroma

Friday, January 15th, 2010

Benign tumour found in the optic nerve.

Orthokeratology

Friday, January 15th, 2010

A technique, viewed by some as controversial, using rigid contact lenses to reduce or eliminate myopia, up to -4.00, by deliberately flattening the corneal curvature.

Overconvergence

Friday, January 15th, 2010

A state where the eyes when focusing on a near object turn in too much resulting in blurred vision.