l carnitine night L-Carnitine and Sleep: Does It Affect Rest or Sleep Quality? not your basic bedtime drink
Description
Several mechanisms have evolved to protect the eye from the phototoxic effects of UV radiation
Hormonal changes can intensify things further

Burm JP, Choi JS, Jhee SS et al

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2018;362(6420, article eaat7615) doi: 10.1126/science.aat7615
Results: A total of 1479 articles were retrieved, and after the removal of duplicates through both automated and manual exclusion processes, 962 articles remained