Synopsis
There are two types of light receptors within the retina responsible for detecting and processing light: the rods and the cones.
Similar broadcast resources

IVF | How Science Changed Our World
Professor Robert Winston meets families who benefitted from breakthrough's in research which lead to IVF treatments.

Fear Response | The Human Body : The Secrets of Your Life Revealed
Chris van Tulleken accompanies some snake hunters at work, showing what happens inside our bodies when we experience fear.