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].
As an antioxidant, vitamin C helps to prevent cataracts -- the clouding of the lens of the eye that can lead to blindness in older adults. The lens needs a lot of vitamin C to counteract all the free radicals that form as a result of sunlight on the eye. Vitamin C is concentrated in the lens.