6. Eggs
Egg yolk is an effective source of lutein and zeaxanthin, both of which prevent age-related vision deterioration. Their yellow-orange color blocks harmful blue light, which can damage the retina. Furthermore, lutein and zeaxanthin increase the amount of protective pigment in the macula, which controls central vision. Eggs also contain vitamin A, which helps protect against night blindness and dry eyes, and vitamins C and E, and zinc.