Which system has poorer spatial resolution due to large summation?

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Multiple Choice

Which system has poorer spatial resolution due to large summation?

Explanation:
Spatial resolution in vision depends on how much input from nearby receptors is pooled before reaching the brain. In low light, the system relies on rods that converge onto the same downstream cells, creating large receptive fields. This heavy pooling, or summation, smooths over fine details, so two nearby points can’t be distinguished as well. In bright light, cones connect to fewer rods and have smaller receptive fields, so spatial detail is preserved and acuity is higher. So, the system using rods under low-light conditions has poorer spatial resolution due to large summation.

Spatial resolution in vision depends on how much input from nearby receptors is pooled before reaching the brain. In low light, the system relies on rods that converge onto the same downstream cells, creating large receptive fields. This heavy pooling, or summation, smooths over fine details, so two nearby points can’t be distinguished as well. In bright light, cones connect to fewer rods and have smaller receptive fields, so spatial detail is preserved and acuity is higher. So, the system using rods under low-light conditions has poorer spatial resolution due to large summation.

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