What is the Visual Process?
The visual process is the means by which the eye perceives light and movement and translates these into nerve impulses which are then interpreted by the brain. How Vision Works: These impulses that are sent from the eyes are interpreted by the brain and a picture is created of the world around us. Light enters the front of the eye and is refracted by the cornea. The lens of the eye then focus’s the light onto a special neural tissue at the back of the eye called the retina. The area of the retina where the light is focused is called the macular. The macular is densely packed with millions of photo-receptors called cones which are sensitive to colored light. Different colored light cause different chemical reactions in these cells and they send impulses to the brain via the optic nerve. The other types of photo-receptors are called rods. They are more numerous, more sensitive to light but do not react to color. This is why the eye cannot distinguish colors in a dimly lit room. The nerve
