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T (Tapetum to Tracoma)

Tapetum

Friday, January 15th, 2010

A lining, silver appearance, found behind the retina in certain animals which aids vision in low illumination.

Tarsoconjunctival Glands

Friday, January 15th, 2010

Small glands found in the eyelids that produce a fatty lubricant for surface of the eye.

Tay-Sachs Disease

Friday, January 15th, 2010

An enzyme deficiency which allows lipid (a type of fat) to deposit in the brain. Predominately found in Ashkenazi Jews (Jews of European origin). (more…)

Tears

Friday, January 15th, 2010

Produce of the lacrimal glands designed to keep the exposed part of the eye moist. They act as a lubricant and a safety agent by swilling away foreign bodies that could scratch the cornea and cause damage. Watery and slightly salty in constitution they are composed of three layers (inner mucous, middle watery and outer oily).

Thermokeratoplasty

Friday, January 15th, 2010

 See Holmium laser.

Tonometer

Friday, January 15th, 2010

Instrument used to asses the intraocular pressure of the eye. This measurement of the internal pressure is vital in monitoring the onset of glaucoma as well as regulating those at have the condition.

Tonometry

Friday, January 15th, 2010

The use of a tonometer to measure the eyes intraocular pressure.

Toric Lens

Friday, January 15th, 2010

A spectacle or contact lens that has two different powers at right angles to each other. Prescribed for the correction of astigmatism.

Tracoma

Friday, January 15th, 2010

Most common cause of blindness worldwide. Caused by a virus infecting the lids and cornea that is both chronic and contagious resulting in dry eyes, corneal clouding, lid and conjunctival scarring plus the growth of blood vessels in the cornea.