Q:

What is the purpose of the optic chiasma?

belongs to book: Examination Questions and Answers in Basic Anatomy and Physiology|Martin Caon|| Chapter number:14.4| Question number:9

waelhammad

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2022-10-19

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What is the purpose of the optic chiasma?

to allow images from each eye to cross over to the other side of the brain prior to crossing back at the decussation of pyramids.
to allow fi bres from the medial aspect of one eye to join fi bres from the lateral aspect of the other eye to form an optic tract.
to allow the fi bres from the lateral aspect of each eye to come together as an optic tract.
to allow light entering the left eye to be interpreted by the right hand side of the occipital lobe (and vice versa).

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waelhammad

2022-10-19

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B: The optic chiasma (crossing) allows the stimulation produced by light striking the rods and cones on the medial aspect of one eye to cross over to the other side of the brain to travel with the stimulation produced in the lateral aspect of the other eye. Hence some information from each eye is interpreted together in each side of the occipital lobe. In this way, binocular vision and the perception of distance is achieved.

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