One of the reasons why we have the greatest visual acuity at…

One of the reasons why we have the greatest visual acuity at the fovea centralis of the macula lutea is because, while it is densely saturated with photoreceptors, the circuit arrangement is such that only a few of them are associated with each bipolar cell creating (less or more) convergence in this region, thus allowing for (less or more) discrimination between incoming signals.

Complete absence of functioning cones is known as achromatop…

Complete absence of functioning cones is known as achromatopsia, this very rare genetic disorder leads to total (full spectrum) color blindness. True or False: What these patients see all the time is similar to what a “normal” vision person sees at night via rods.