Blind Color...

[Chekmate]

This is prolly going to sound retarded, but I was wondering, do blind that used to be able to see, do they see black or white or some other color? Like when I close my eyes really tight, I see black. Is it that way for blind people or not? Thanks

[gigi]

I believe that sight is possible through the ability of the retina to sense light. When I have my eyes closed, I see a number of different colors, and black if I close them tightly, like you. I would think that if a blind person cannot sense light, they wouldn’t see any colors when their eyes were closed, as this depends on some light coming through the eyelid. This is just a WAG, though.

[major hijack]
In looking up vision in WedMD http://my.webmd.com/content/asset/miller_keane_35571 , I came upon this:

Like a camera lens, the lens of the eye reverses images as it focuses them. The images on the retina are upside down and they are “flipped over” in the visual center. In a psychology experiment, a number of volunteers wore glasses that inverted everything. After 8 days, their visual centers adjusted to this new situation, and when they took off the glasses, the world looked upside down until their brain centers readjusted.

Cool!

[/major hijack]