Zinc has some antioxidant characteristics and is found in the retina. Zinc play a major role in bringing Vitamin A from the liver to the retina, helps Vitamin A create a protective pigment called melanin. Zinc also helps support the health of tiny capillaries in the eye, which are essential in nourishing the retina and related connective tissue. Zinc and copper, in balance, help support a proper acid balance in the body, which in turn helps may help avoid development of new floaters.
Chromium may help limit nearsightedness, a risk factor for eye floaters. Chromium also has a role in sugar balance in the body.
Also read about Magnesium & Selenium.