The camera, the lens and their volume of influence has corrupted our habitus/habits in such a way as to deform to conform.
The teacher is a warped mirror. The Devil’s in the details. Oh no, I’ve got a grey eyebrow, better pluck that cunt out. Oh no, my lips are too thin compared to x, y and z, better get some filler in. Oh no, my stomach is bloating, better get liposuction etc.
The frame can be broadcast to indulge set designer whimsy, or it can be any number of people staring at themselves in a mirror wondering how things can be improved. The set designer reflected back at us. The Critic is fully on board with the madness of this logic, due to its deregulation from changing social norms. The resulting culture process swallows individuals whole.