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I am looking at the stroke lecture and it states that a lesion in the crossed fibers of the optic chiasm will lead to bitemporal hemianopsia. Based on how the diagram of visual pathway goes, it makes it look like the visual deficit would be binasal hemianopsia. Furthermore, the light on the right visual field would shine to the right nasal and left temporal. Wouldn’t the left temporal remain ipsilateral and R nasal cross in order for the R visual field to project to the L visual cortex? So wouldn’t a lesion to the crossed fibers of the optic chiasm lead to nasal visual field blindness?
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Wait a second, I think I figued it out. I came to realization that the nasal retinas are responsible to the temporal visual fields of each eye. I think I was struggling because I was not differentiating temporal and nasal visual fields to temporal and nasal retinas!
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