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 C helps with long term healthy vision support. Vitamin E helps with long term healthy vision support. R- Alpha lipoic acid is a powerful antioxidant that enhances glucose use in brain and eye cells. Usually a dose of 10 to 50 mg of R-Alpha lipoic acid can have a positive influence on vision.
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.