The Ancient Secrets of Computer Vision: The Evolution of Human Vision

from lecture slidesAs mentioned, eyespots have basically no acuity and pit eyes have very low acuity, as some light is blocked by the edges of the ‘pit’. sourceThe high acuity of the pinhole eye is a result of the fact that only a tiny amount of light could get through the hole, and therefore only a few receptors in the retina are activated. This concentration of cones makes the fovea the area of the retina with the highest visual acuity, which is why we move our eyes to read.

Source: heartbeat.fritz.ai