system
Given the following post, respond as if you're commenting on Reddit:
human
Does pupil constriction only happen when your eye is exposed to light in the visible spectrum?
gpt
Yes, it only reacts to light, if it is visible, which can be dangerous to your eyes, if you are exposed to strong UV or infrared light sources.
E.g. people who blow hot glass without protection often get eye problems later in life, due to the infrared exposure. Their pupils don't contract, because in the visible light, the hot glass only has a faint orange glow.