see Phototransduction

The entire area that the eye can see from side to side without physically moving the eyes or head (includes peripheral vision).

see Photodynamic Therapy

see also Beta-carotene, Rhodopsin: Vitamin A is found in certain animal and milk products, fruits and vegetables (and as a commercial supplement) that is used as part of a nutritional treatment of RP.

An anti-oxidant found in certain fruits and vegetables (and as a commercial supplement) that is used as part of a nutritional treatment of AMD.

An anti-oxidant found in certain oils, nuts, and other foods (and as a commercial supplement) that is also used as part of a nutritional treatment of AMD.

The clear, jelly-like substance found in the middle of the eye that helps to regulate eye pressure and shape.

A measure of the character of light, where certain wavelength ranges define and distinguish different "types" of light. The photoreceptor cell detects and chemically converts light of certain wavelengths within the visible range (between 400-700 nanometers or nm) into electrical signals that travel, via the optic nerve, to the visual cortex in the brain.

The inherited package (or chromosome) of DNA that contains genes that help to determine the sex of an individual. Two X chromosomes are inherited by females and one X chromosome and one Y chromosome are inherited by males. Mutation of a gene found on the X chromosome can cause X-linked diseases.

see X Chromosome

see Retinoschisis

see Retinoschisis

The chromosome (DNA package) passed-down from biological father to son that contains genes that determine male gender.

see Lutein and Zeaxanthin