Zymaxid can be expensive if you don't have health insurance, prices at local pharmacies can vary greatly, but be prepared to pay as much as $100 for a 2.5ml bottle size of zymaxid 0.5 eyedrops.
Vitamin A is critical for vision as an essential component of rhodopsin, a protein that absorbs light in the retinal receptors, and because it supports the normal differentiation and functioning of the conjunctival membranes and cornea [2-4].
1 Beta carotene is converted, as needed, to vitamin A. Food sources of beta carotene include vegetables such as carrots, sweet potatoes, spinach and other leafy green vegetables; and fruit such as cantaloupes and apricots. form of vitamin A called retinal is responsible for transmitting light sensation in the retina of the eye. Deficiency of vitamin A leads to night blindness. The word vitamin was coined in 1911 by the Warsaw-born biochemist Casimir Funk (1884-1967).