this is also for my book, for all that saw my previous question. what causes cortical blindness (like examples) and what is it? i don't understand the concept i guess.
2007-11-24 15:45:35 · 2 answers · asked by Anonymous in Health ➔ Optical
Most people associate blindness with the *eyes* not working, and this is frequently the case.
But damage, from a wide variety of causes from strokes to trauma to the back of the head, to the the parts of the brain that process the visual image can cause blindness when the eyes themselves are fine.
Equivalent, (pre-digital era!): your holiday photos are ruined either because your camera is has a fault, OR, the camera is fine but when you send the film for processing, the laboratory has a fault.
Cortical blindness can involve both "blindsight"
where there is some degree to detect objects or motion despite there being no sensation of vision.
And the reverse,
"Anton's blindness" where a person may be seemingly unaware that they are blind!
2007-11-24 21:03:52 · answer #1 · answered by Pedestal 42 7 · 0⤊ 0⤋
Cortical blindness means that the parts of the brain responsible for vision aren't working. Stroke, brain bleeding, brain trauma, brain tumour are causes.
The eyes collect light and send the information via the optic nerve to the brain. The brain processes the info to create vision. If the brain doesn't work, you cannot see and have cortical blindness.
2007-11-24 17:10:13 · answer #2 · answered by Judy B 7 · 1⤊ 0⤋