AP PSYCHOLOGY

SENSATION AND PERCEPTION

BASIC CONCEPTS OF SENSATION AND PERCEPTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Visual acuity is best in the
A
lens
B
iris
C
pupil
D
fovea
E
cornea
Explanation: 

Detailed explanation-1: -The fovea centralis is located in the center of the macula lutea, a small, flat spot located exactly in the center of the posterior portion of the retina. As the fovea is responsible for high-acuity vision it is densely saturated with cone photoreceptors.

Detailed explanation-2: -The part of eye called Fovea has the area of greatest acuity. It is situated inside the macula. It has the maximum number of rods responsible for vision.

Detailed explanation-3: -The fovea or fovea centralis is a small depression at the center of the retina that’s responsible for central vision. It’s the point at which visual acuity is at its highest. Visual acuity is the ability to identify the details of objects when you look at them.

Detailed explanation-4: -Because of the layers that are swept away, there is less scattering of light in the fovea, allowing for the visual acuity to be higher in the fovea. It is the foveae of the retinae that give humans our excellent visual acuity. By visual acuity, we mean the clarity of vision.

Detailed explanation-5: -The fovea contains the highest density of cone photoreceptor cells and is the only region of the retina where 20/20 vision is attainable. We have high acuity (ability to see fine detail) in the fovea because there is little convergence-basically one photoreceptor for every output ganglion cell.

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