> It's a form of exhaustion of the sensing cells and doesn't necessarily damage them. As someone with experience in the field: this is half true at best, since

> It's a form of exhaustion of the sensing cells and doesn't necessarily damage them. As someone with experience in the field: this is half true at best, since you can get the same symptons with proper, permanent and irreversible damage. Claiming it is "just exhaustion" is a dangerous attitude to have.