Which statement describes the direction of superior fibers after crossing the chiasm?

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Study for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Use flashcards and multiple choice questions, complete with hints and detailed explanations. Prepare effectively for your exam!

Multiple Choice

Which statement describes the direction of superior fibers after crossing the chiasm?

Explanation:
The crossing at the optic chiasm preserves retinotopic ordering, with nasal retina fibers decussating to the opposite side. The fibers that come from the superior portion of the retina—carrying information about the inferior visual field—reorganize as they cross, ending up positioned closer to the midline in the contralateral optic tract. In other words, these superior fibers tend to move toward the midline after crossing.

The crossing at the optic chiasm preserves retinotopic ordering, with nasal retina fibers decussating to the opposite side. The fibers that come from the superior portion of the retina—carrying information about the inferior visual field—reorganize as they cross, ending up positioned closer to the midline in the contralateral optic tract. In other words, these superior fibers tend to move toward the midline after crossing.

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