The region of the retina where the cone cells are most densely packed and images are sharpest is called the centralis.

It seems there is a small error in your statement regarding the region of the retina. The correct term is fovea centralis, which is a small pit located in the retina that contains a high density of cone cells. The fovea is responsible for sharp central vision and is the part of the retina where visual acuity is the highest. It plays a crucial role in activities where visual detail is of utmost importance, such as reading and recognizing faces. This area allows for the best color discrimination and is essential for tasks that require fine visual accuracy. The rest of the retina has fewer cones and more rod cells, which are more sensitive to light and are responsible for peripheral and night vision.