Where is the choroid thinnest?

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Study for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Prepare using flashcards and multiple choice questions. Get ready for your exam with hints and explanations for each question!

Multiple Choice

Where is the choroid thinnest?

Explanation:
Thickness of the choroid varies across the posterior segment. It is thickest beneath the posterior pole to meet the high metabolic needs of the photoreceptors there, especially under the fovea. As you move toward the anterior edge of the retina, the choroid progressively thins and reaches its minimum at the ora serrata, where the retina ends and the choroidal tissue tapers toward the sclera. This makes the ora serrata the thinnest region.

Thickness of the choroid varies across the posterior segment. It is thickest beneath the posterior pole to meet the high metabolic needs of the photoreceptors there, especially under the fovea. As you move toward the anterior edge of the retina, the choroid progressively thins and reaches its minimum at the ora serrata, where the retina ends and the choroidal tissue tapers toward the sclera. This makes the ora serrata the thinnest region.

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