Foveola

Foveola
Details
Identifiers
Latin	foveola
TA	A15.2.04.023
FMA	77666
Anatomical terminology []

The foveola is located within a region called the macula, a yellowish, cone photo receptor filled portion of the human retina. The foveola is approximately 0.35 mm in diameter and lies in the center of the fovea and contains only cone cells, and a cone-shaped zone of Müller cells. In this region the cone receptors are found to be longer, slimmer and more densely packed than anywhere else in the retina, thus allowing that region to have the potential to have the highest visual acuity in the eye.

The centre of the foveola is sometimes referred to as the umbo.

...
Wikipedia