Physiology, Vision

Excerpt

Vision is one of the five senses the body uses to interpret its surroundings. In the past, our primitive ancestors had what is called "dichromatic vision,” allowing for interpretation of only UV light and red light. About 30 million years ago, the trichromatic part of vision came to existence due to the evolution of opsin genes. Humans can now see black, white, red, green, and blue, as well as the colors in between this spectrum since the retina and the brain are equipped to differentiate them. What happens between an object and a synapse in the most posterior part of the brain is the fascinating journey that we will cover.