Thanks bro for the information i ve only seen these doctor stuff in the old cartoons.

True, it is extremely not used by normal doctors irl nowadays. But it was used in older times, since having a battery powered head lamp wasn't really a thing back then. They had to concentrate the ambient light of where-ever they were working (using the round, concave metal disk part) and then reflect it to focused spots (again, with the concave disk) in order to illuminate specific parts of their patients. Nowadays, only cartoons, comic books, and video games use it to visually identify a character as a doctor. Or at least, somebody claiming to be one. Although, I swear I once read somewhere some lore that would justify a Novakid doctor wearing one "because that's what they saw doctors in comic books do" but I just can't find a reference. (My headcanon, at least, says they would totally wear one because "that's what doctors do" and not even know how to use it since novakids produce their own light all the time.)

i never seen a medic using this, only the Doctor Mario.