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Seabuckthorn oil

In 2016 Nutrients published an animal study which found that orally administered seabuckthorn oil protected the retinas of rabbits from light induced retinal damage. [Source]

In 2015 Investigative Ophthalmology & Visual Science published an in vitro study which showed that quercetin and resveratrol both exhibited anti-inflammatory and antioxidant effects on eye cells which suggests therapeutic potential in the treatment of inflammatory ocular surface diseases (eye diseases). [Source]

In 2006 The Journal of Nutrition published a cross-over study in which 33 men and women over the age of 60 consumed 1 egg per day for 5 weeks. Compared to baseline lutein concentrations increased 26 percent and zeaxanthin concentrations increased 38 percent. [Source]
In 2006 The Journal of Nutrition published a 12-week, placebo-controlled trial involving 24 females which found that subjects who consumed 6 eggs per week had increased levels of zeaxathin and macular pigment optical density (MPOD) – a key factor in improving visual performance and reducing the risk of age-related macular degeneration. [Source]

In 2013 The Journal of Clinical Biochemistry and Nutrition published a study involving 35 patients who underwent bilateral cataract surgery which found that 6 mg astaxanthin for 2 weeks was able to provide a significant free radical scavenging effect in the aqueous humor – the clear fluid between the lens and cornea of the eye. The authors of the study concluded that astaxanthin may help prevent stress-related eye disease. [Source]

In 2013 the Journal of Oleo Science published a study of 12 healthy subjects which found that 9 grams/day chlorella supplementation for 2 months increased blood concentrations of lutein (an antioxidant known for promoting eye health) by 400 percent. After one month without chlorella, lutein concentrations returned to base levels. [Source]

In 2009 Investigative Opthalmology & Visual Science published an in vitro study which found that CoQ10 levels in eye tissue can decline by 40 percent with age, which may be linked to the progression of macular degeneration. [Source]
In 2014 Apoptosis published an animal study in which the authors determined that CoQ10 promotes the survival of retina cells in mice by reducing free radical activity. [Source]
In 2012 the Journal of Radiation Research published a study which found that CoQ10 was able to protect retina cells from ultraviolet radiation damage in both an animal model as well as in a test tube model. [Source]