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].
Vitamin A (Retinol) Vitamin A is a fat-soluble vitamin that has several important functions in the body. 1  It helps cells reproduce normally, a process called cellular differentiation.  It is essential for good vision. The first sign of a vitamin A deficiency is often poor sight at night.