How far does eye recognition work?

Question

Biometric identification

Under ideal conditions in full hd resolution.

Answer 1

With optical contact. You need to look into a special lens - due to a clear focus, the distance must be constant - this means that the surface must be fixed. Of course, you can recalculate - 0.1 megapixel is enough for the entire area of ​​\u200b\u200bthe eye. At 2 megapixels with a standard 3.6 mm lens - I think the distance will be 50 ... 60 mm - and without fixing it will take a long time to catch focus on the surface. The further the object, the fewer pixels per detail - the fewer pixels, the less information for identification.
Real life is not a movie.