The Nation Eye Institute (NEI) and American Academy of Ophthalmology (AAO) Preferred Practice Pattern Guidelines advise against use of the common drug-store formulations in certain circumstances. 

Several published studies indicate harm from mega-dose zinc use. (Chew, 2001)

Some individuals will experience harmful effects from taking mega-dose zinc formulations. Only the VitaRisk genetic test can identify people who may wish to avoid taking mega-dose zinc supplements. (Kaufman, 2020; Vavvas, 2018; Seddon, 2016; Awh, 2014, 2013)

Help support eye health with the macular carotenoids: lutein, zeaxanthin, and meso-zeaxanthin.

• People with healthy eyes should not take drug store eye vitamins with a mega-dose of zinc. Your doctor can help determine the bext ocular nutrition product to help maintain healthy eyes.

For those with aging eyes, a simple cheek swab genetic test is the only way to avoid the potential harm from commonly-advised mega-dose zinc supplements (Kaufman, 2020) (Vavvas, 2018) (Seddon, 2016) (Awh, 2014, 2013)

Meso-zeaxanthin is the central carotenoid making up the macular pigment. While lutein and zeaxanthin can be obtained through a healthy diet, meso-zeaxanthin is scarce in commonly-consumed foods. Vision Elements Early Defense is a good source for this important carotenoid (Ma, 2016)