The aging demographics of most countries has meant that the prevalence of visual impairment and blindness due to degenerative eye diseases has increased exponentially. The common age-related eye diseases include glaucoma, age-related macular degeneration (AMD), cataracts, and diabetic eye complications. Much of these age-related diseases leading to vision loss could be eliminated or minimized if healthy behavior changes or treatment could be implemented earlier. There is a growing interest in the role of nutritional factors in preventing or delaying degenerative diseases of the eye, by targeting food habits or by supplementation with specific nutrients. This review will focus on ocular diseases that are most prevalent in the older population (AMD, cataracts, glaucoma, and diabetic eye diseases) and the role of key nutritional factors that could potentially provide protection against eye aging: antioxidants; lutein and zeaxanthin (carotenoids found specifically in the eye); and polyunsaturated fatty acids.