Which region contains the lowest density of cones?

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Test your knowledge on photoreceptors. Use flashcards and multiple-choice questions, each with hints and explanations. Prepare for your test with confidence!

Multiple Choice

Which region contains the lowest density of cones?

Explanation:
Cones are packed most densely in the fovea, giving sharp, color-rich central vision. As you move away from that center toward the macula outside the fovea, cone numbers drop, but there are still cones present. In the peripheral retina, cones become sparse and rods dominate. The optic disc is where the optic nerve exits the eye and it contains no photoreceptors at all. With no cones there, the density is zero, which is the lowest possible. So the region with the lowest density of cones is the optic disc.

Cones are packed most densely in the fovea, giving sharp, color-rich central vision. As you move away from that center toward the macula outside the fovea, cone numbers drop, but there are still cones present. In the peripheral retina, cones become sparse and rods dominate. The optic disc is where the optic nerve exits the eye and it contains no photoreceptors at all. With no cones there, the density is zero, which is the lowest possible. So the region with the lowest density of cones is the optic disc.

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