Vision 2 - VISION 2 Visual information processing lesions...

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VISION 2. Visual information processing. lesions along visual pathways- what part of the visual field is affected? cut optic nerve: (vision in ipsilateral eye) cut optic tract: (contralateral visual field)
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Cut axons crossing in chiasm (pituitary tumor) what do you lose? effects different in the two eyes, test visual fields separately in the two eyes left visual field in left eye right visual field in right eye
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pituitary tumor can destroy fibers crossing in the chiasm Corneal transplants are possible, why are eye transplants not???
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small lesions in the lgn or cortex will result in a scotoma, a hole in the visual field patients are not aware of them, revealed only by testing of visual fields we all have a scotoma, the blind spot, optic disc, place where axons gather together and leave the eye as the optic nerve test visual fields of right eye: no vision in oval
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BLIND SPOT DEMO Close your left eye and stare at the cross mark in the diagram with your right eye. Off to the right you should be able to see the spot. Don't LOOK at it; just notice that it is there off to the right. Now slowly move the paper slowly toward you. Keep looking at the cross mark. At a particular distance (probably about 9 inches if this is printed at 8 x 11) the spot will disappear (it
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Vision 2 - VISION 2 Visual information processing lesions...

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