Some research suggests a link between diet and the risk of age-related macular degeneration [1].

Macular degeneration (MD) is where a small section of the retina called the macula degenerates with age and affects central vision. The macula is a yellow spot and is rich in carotenoids, lutein and zeaxanthins. These carotenoids are carried to the eye on HDL good cholesterol. 

In a small Australian study, 1-2 handfuls of nuts a week reduced MD by 35% [2].

As the retina is highly susceptible to oxidative stress, it’s thought that nutritional factors, such as antioxidants, carotenoids, vitamins and essential fatty acids (many of which are found in nuts) may help to protect the eye.