People can have brown, black, blue or green eyes. Which part of the eye gives it this special colour?? Why?
Please find below the answer:
Iris is present in the eye in the form of a thin diaphragm. Like the diaphragm controls the amount of air entering the lungs, iris controls the amount of light entering the eye. It is coloured due to the presence of a pigment and it is due to this pigment that the iris gives the eyes a particular colour.
Hope this clears your doubt.