• Question: what is the pupil of you eye made of?

    Asked by to Anna, Elaine, Fiona, Kevin, Darren on 24 Jun 2014. This question was also asked by .
    • Photo: Anna Bramwell-Dicks

      Anna Bramwell-Dicks answered on 24 Jun 2014:

      The pupil isn’t made out of anything… I think of it as a hole that is covered by the cornea (which is a thin layer of tissue basically). The muscles around the pupil control how big this hole (or opening) is – when it’s dark the pupil will get bigger to allow more light in, and when it is light it gets smaller.

    • Photo: Fiona McLean

      Fiona McLean answered on 26 Jun 2014:

      Anna is right, the pupil is just an opening which lets light into the eye! The amount of light that enters is controlled by the iris of the eye, which is the coloured part of your eye. The reason the pupil appears black is because all the light that enters the eye is absorbed by the retina and other parts of the eye. This means that no light is coming back out the eye and the pupil appears black!

Comments