glossary

Glaucoma in which the intraocular pressure is normal but there is progressive optic nerve damage and visual field loss. Also known as Low Tension Glaucoma.

A type of vision test in which progressively dimmer lights are moved from the peripheral vision into the central vision, using an instrument that allows the point at which the light is first seen to be accurately mapped. In this test, a trained perimetrist moves the stimulus; stimulus brightness is held constant. The limits of the visual field are mapped to lights of different sizes and brightness. Also known as Goldmann kinetic perimetry.

Lens for near vision only shaped like the lower half of a normal lens.