glossary

A general term for color vision abnormalities. Heritable dyschromatopsias include red (protan), green (deutan), and blue (tritan) color vision deficits. These deficits may be partial (-omaly) or complete (-opia). Red and green color vision defects are X-linked while loss of the blue receptor (tritanopia) is inherited in an autosomal recessive fashion.

Corrects eyesight disorders and is a combination of material, optical surface and coatings.

Transparent biconvex lens located behind the pupil; refracts light to focus images on the retina. The natural lens inside of the eye. Transparent, biconvex intraocular tissue that converges light to helps bring rays of light to the retina.