Here are a few things I found:
Eye Disorders and Eye Problems in Dogs and Cats
Natural Treatments for dogs and cats with eye disorders
Good nutrition plays an important role in the overall health of your pet and can help to maintain healthy eyes and vision. When an animal has severe vitamin deficiencies or is malnourished, cataracts and other eye disorders can develop.
There are several vitamins, botanicals and other nutrients that help to nourish the eyes:
Vitamins A, C and E have antioxidant properties which fight free radicals that can damage the lens of the eye.
Bilberry extract (Vacciuium myritllus) derived from a fruit similar to the blueberry, contains active ingredients for eye health and proper vision. The berries are rich in the antioxidant anthocyanosides -- the red pigments that are beneficial in ophthalmology and vascular diseases. Nicknamed "the vision herb" bilberry has a substantial body of research that confirms its benefits for human eyes. This herb is very helpful to animals with early stage eye disorders, or for animals that have a genetic predisposition to eye problems.
Zinc is a mineral linked to good vision and may protect eye tissue from damaging light and inflammation. Zinc is found in healthy retinal tissue.
Lutein, a carotenoid found in dark, leafy greens, is also found in the retina of healthy eyes where it acts as a shield against harmful light and may help protect the eyes against damage from ultraviolet radiation.
Quercetin is a natural antioxidant bioflavonoid that protects cells from damage by free radicals.
Alpha Lipoic Acidis the "universal antioxidant" because it works in both water and fatty tissues, providing antioxidant protection to all your pet's cells. It restores numerous biological functions that become diminished with aging and helps to prevent cataracts.
Mixed Carotenoids contain antioxidants found in carotenoid-rich food, that is, produce that are rich in color. Two specific carotenoids, lutein and zeaxanthin, provide antioxidant protection in the macular region of the ey and have been found to reduce the incidence of caratacts.
Grape Seed Extract has a high content of compounds called oligomeric proanthocyanidins (OPCs), which are potent antixodiants. They provide a wide range of antioxidant benefits: supporting healthy skin, providing cardiovascular support, improving blood circulation and reducing the risk cataracts.
Holistic Healthcare Library | Articles and Advice on Dog and Cat Health | Natural Pet Articles
(Read entire article lots of GOOD info)
Antioxidants for Pets, Benefits of Antioxidant supplements
(Another good read)
Common Dog Health Problems Symptoms & Natural Dog Remedies