Question

Vision is especially acute in the fovea and surrounding macula because of a high density of cone cells and because __________. Vision is especially acute in the fovea and surrounding macula because of a high density of cone cells and because __________. the optic nerve exits the retina at the fovea, providing an area very sensitive to light there is an optimal mix of rods and cones this is the only area of the retina with rods there are no neurons covering the cones.

Answer 1

Answer:

Answer:

Anatomically  this is because  there are no neurons or blood vessels covering the cones.

Explanation:

Fovea centralis  and its containing  cones cell  is   surrounded by the  macula lutea  to form  a depression or pit in the retina. The  abundant cones cells provide high visual acuity characteristic of the fovea.

In addition  an area in the fovea of no  blood cells called fovea avascular zone   allows light rays to  be focused on the fovea, with less scattering,this minimises the losses of incident lights on the fovea, and therefore  reception of  maximum light rays from objects for acute vision.

Therefore the presence of abundant cones cells in the fovea  together with the presence  of fovea avascular (area with no blood cells)which reduces dispersion of light rays for maximum receptions are responsible for high visual acuity  of the fovea.

This explains the reasons why fovea is refereed to as the  center  for primary vision  or fovea vision  where  high degree of visual activity is  needed   such as focusing with microscope, reading,knitting and driving

Explanation: