The fovea centralis of the human retina is the seat of most acute vision, and in the fovea centralis there are no rods.
The fovea centralis lacks rods and this part of the eye becomes practically color blind at very low intensities of light.
It is exactly that line which joins the point fixed with the centre of the fovea centralis.
This central part is called the fovea centralis and is the point of acutest vision.
fovea centralis fovea cen·tra·lis (sěn-trā'lĭs)
A depression in the center of the macula of the retina, the area of the most acute vision, where only cones are present and where blood vessels are lacking. Also called central fovea, central pit.