Royston Posted May 28, 2006 Share Posted May 28, 2006 This question is on behalf of a friend. Why is it, when you close your eyes and press on your eye ball, after some time you get white blotches appear, but there are no visible light waves entering the pupil ? Link to comment Share on other sites More sharing options...
aj47 Posted May 28, 2006 Share Posted May 28, 2006 When light enters your eye, it hits photoreceptors called rod and cone cells on your retina which contain light sensitive pigments (rhodopsin and iodopsin) that break down when exposed to light. When this happens it create an impulse to the sensory areas of the brain allowing you to see. When you press on your eyeball, the pressure has basically the same effect as light and breaks down the pigment to send impulses to the brain as if it were light. Link to comment Share on other sites More sharing options...
Royston Posted May 29, 2006 Author Share Posted May 29, 2006 Thanks for the response Aj47, I'll send a link to my mate. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now