• Question: if our pupil of our eye is just a black hole why cant we see the sides of the hole ???

    Asked by ceharris to David, Rebecca, Simon, Verity, Wei on 15 Jun 2011.
    • Photo: Rebecca Handley

      Rebecca Handley answered on 14 Jun 2011:

      You can! Your total field of view is actually a large circle. You never see the hole as being black, because when your eyes are open light is travelling through the hole. I guess the only time you will see it properly, is when you have your eyes closed – but then its too dark to see anything!

    • Photo: Wei Xun

      Wei Xun answered on 14 Jun 2011:

      Hi!

      The whole image that we see with two eyes are actually two big approximate circles with the middle merged together, they are also actually up-side down as light is refracted through the lenses in your eyeballs, but your brain works it all out and flips it so that you see one whole image the right way round. But you can only see the light that falls through your lenses.

      You also have a “blind spot” in each eye, this is where the bundle o your optical nerve goes from your retina towards the brain and it can’t sense light, so it’ll be a tiny black spot when you notice it.

      If you go to the opticians they can measure your visual field and show you a diagram of it!

    • Photo: Verity Nye

      Verity Nye answered on 15 Jun 2011:

      I think the girls have already covered this one.

    • Photo: David Armstrong

      David Armstrong answered on 15 Jun 2011:

      This website http://www.pasadenaeye.com/faq/faq15/faq15_text.html has a good explination on how the eye works.

Comments