A patient undergoes a visual assessment under low-light (scotopic) conditions. They are able to detect a very dim point of light in their peripheral vision, but they struggle to resolve two closely spaced points of light as separate objects.
The diagram below shows the arrangement of photoreceptors (rods and cones) and their connections within the retina.
Which statement correctly explains why the patient can detect the dim light but cannot resolve the two separate points in these conditions?
Multiple rod cells synapse with a single bipolar cell, allowing spatial summation to exceed the threshold for an action potential, but preventing high visual acuity.
Multiple rod cells synapse with a single bipolar cell, allowing temporal summation to exceed the threshold for an action potential, but preventing high visual acuity.
Each cone cell synapses with a single bipolar cell, preventing spatial summation and resulting in high sensitivity but low visual acuity in low-light conditions.
Multiple cone cells synapse with multiple bipolar cells, resulting in spatial summation that increases both visual acuity and sensitivity under low-light conditions.