Yeah, using blinding weapons on planes in a war scenario isn't very viable, treaty or not. Arguably blinding weapons could be helpful against infantry or armor,

Yeah, using blinding weapons on planes in a war scenario isn't very viable, treaty or not. Arguably blinding weapons could be helpful against infantry or armor, but not really against aircraft. If you're close enough to be able to shine a laser at an aircraft you're also more than close enough to fire a missile at it. Far more likely to have lethal effects, better range, plus you don't have to worry about your weapon being defeated by fog (to a degree if you're using IR-guided missiles). This is really limited to these "gray zone" conflicts in a non-wartime environment, and possibly when waging guerrilla warfare.