Question

which part of our eye determine our pupil colour

Answer 1

Answer:

Iris...

The iris regulates the amount of light that enters your eye by adjusting the size of the pupil opening. In bright light, the iris closes (or constricts) and makes the pupil opening smaller to restrict the amount of light that enters your eye. In addition, it is the iris that determines your eye color.

Answer 2

Iris is part of our eye determine our pupil colour.