Retina uses special cells called “rods” and “cones” .
Rods “sees” in black, white & shades of grey and tell us the form or shape. (Super-sensitive allowing us to see when it's very dark.)
Cones “senses” colour but need more light. Three types and each is sensitive to one of three different colours - red, green, or blue. Together these can sense combinations of light waves. (To see millions of colours.)
Rods and cones together process the light to give you the total picture.
The Rods and Cones 5 million per eye (more L and M cones than S cones) 100 million per eye Responsible for daylight (photopic) vision Responsible for low- level (scotopic) vision Cone function Rod function scotopic mesopic photopic luminance Cones Rods