It’s an interesting tale… but I think I’ll hold off. In short, some fellers decided to put some chemicals in their eyes that tinkered with their retinas, making them more light sensitive and giving them substantially improved night vision.

A Review on Night Enhancement Eyedrops Using Chlorin e6

The utility of this sort of thing for the military, astronomers, farmers and others is obvious. Just make sure you have enough menthol cools.

Additional:

Ce6 eyedrop application and testing photos