"Lycopene, a naturally occurring red carotenoid pigment found in tomatoes, pink grapefruit, watermelon, and other fruits, is associated with many beneficial effects on human health. In the human eye, lycopene is present in the retinal pigment epithelium (RPE)-choroid, ciliary body, and iris."
https://www.sciencedirect.com/science/article/abs/pii/B9780124017177000605