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].
Bausch & Lomb has been selling a product called PreserVision Eye Vitamin AREDS Formula. It contains the same combination of vitamins C, E, beta carotene and zinc that was shown to slow the progression of moderate to advanced macular degeneration in the AREDS trial.