I’d love to read more about this. Especially the part about the Geneva Convention.
I’m guessing it was the Protocol on Blinding Laser Weapons.
https://en.m.wikipedia.org/wiki/Protocol_on_Blinding_Laser_W...
https://en.m.wikipedia.org/wiki/Protocol_on_Blinding_Laser_W...
The idea was to mess up scope optics, but human heads have lenses too. It was not Geneva Conventions friendly.