My friend has stereo blindness due to having very poor vision in one eye as a kid, but he never wore the eye patch because he didn't want to get bullied. Implem

My friend has stereo blindness due to having very poor vision in one eye as a kid, but he never wore the eye patch because he didn't want to get bullied. Implementing a filter like that would be pretty easy in any Unity-based application, but I wonder where he can get his hands on some "Donepezil."