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True or false:
The optic nerve is part of the diencephalon
True
What is the fovea?
The region of the retina with the highest visual acuity.
What is the macula?
An oval region approximately 3 x 5 mm that surrounds the fovea and also has high visual acuity
What photoreceptor is the most prominent in the macula and fovea?
Cones: Which have high spatial and temporal resolution and they detect colors.
What are rods?
Photoreceptors that are sensitive to low-level lighting.
Which type of photoreceptors are the most prevalent within the eye?
Rods are far more numerous by ratio of about 20:1.
What is the name of the area on the retina where axons gather to form the optic nerve?
The optic disc. This is a physiological blind spot.
How are rods and cones distributed throughout the retina?
Rods are more prevalent along the periphery of the retina, and cones increasing prevalence as you approach the macula.
What is the relationship between optic nerves, the optic chiasm, and optic tracts?
Optic nerves are pre-chiasmatic, the optic chiasm is where the nerves connect and partially decussate, optic tracks are post chiasmatic and travel to the lateral geniculate nucleus (with some fibers going to superior colliculus).
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