One Comment

  1. Dr David A. Woolf

    I think you mean the colour of the irides (plural of iris), not the colour of the pupils. The pupil is the aperture in the centre of the iris and is always black, unless the person has a dense cataract. The colour of the iris varies according to the amount of pigment present (blue – little pigment; brown – a lot of pigment).

Comments are closed.