Human Vision

Human visual field: about 200 degrees of arc The linked PDF file shows the human visual field which comprisis about 100 degrees of arc for each eye. The area of overlap comprises about 60 degrees. 
Fovea(area of highest resolution): about 2 degrees of arc The linked PDF file shows the distribution of acuity in the human visual field. There is a distinct peak in the fovea (center of the eye) that comprises only 2 degrees of arc The linked image shows the HCI lab of the Department of Information and Computer Science, University of California, Irvine
    75% of the human visual operations are related to the fovea.
    Human vision is not like a camera; does not take a complete picture at once The linked PDF file shows the physiology of the human eye.

Light reception takes place in the retinaThe linked PDF file shows the physiology of the human eye., which contains 2 types of photoreceptors:
 

ConesRods
Mediated visual impressioncolorsdegrees of brightness (b/w)
Distribution over retinafovea onlynot in the fovea
Sensitivity for brightnesslowhigh

Three types of cones: The linked PDF file shows the three cone types that are responsible for the perception of the primary colors red, blue and green.