Problem:
Apart from being able to sense color, cone cells are able to perceive finer detail and more rapid changes in images, because their response times to stimuli are faster than those of rods.
The fovea centralis is where cone cells are most concentrated and is responsible for sharp central vision (foveal vision), which is necessary in humans for reading, driving, and any activity where visual detail is of primary importance.
Required:
Question: It is hard to imagine what it would be like to be missing the fovea centralis, and even harder to imagine what it would be like to have one the size of the entire retina! In any case it seems that having a bigger fovea centralis would be beneficial for survival, so why do we have so much peripheral vision?
Does anyone know how to go about this search to explain it.