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].
Safe sun exposure is the best way to optimize your vitamin D levels, but a safe tanning bed, or a vitamin D3 supplement, can also be used. Other important nutrients for eye health include astaxanthin, lutein, zeaxanthin, bilberry, black currant and omega-3 fats.