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______ is the point where visual acuity is the greatest.
Fill the blank with the correct option.
Solution:
The fovea centralis is a small depression in the retina where cone cells are most concentrated. This area is responsible for sharp central vision and is the point of highest visual acuity. The blind spot is where the optic nerve leaves the eye and lacks photoreceptors, resulting in no vision. The pupil is the opening that controls light entry, and the iris is the colored muscle that regulates the pupil size.