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].
What is Vitamin A Deficiency. The foremost answer to the question what is vitamin A good for, is to improve vision. Therefore, lack of vitamin A in one's diet can lead to poor vision. The diseases caused by lack of a particular vitamin / nutrient in the diet are known as deficiency diseases.