2.86 - The Eye

2.86 describe the structure and function of the eye as a receptor
The eye is a receptor that responds to light.
Light enters your eye through the transparent cornea, it passes through the lens and is focused on the retina. 
In the retina there are cells which are sensitive to light called rods and cones. 
When light stimulates them, they send impulses to the brain along the optic nerve, 
Your brain then interprets these impulses to make a picture. 


The image on the retina is inverted but the brain has learned to turn the picture the right way up. 
In the retina the rod cells respond to dim light and cone cells detect color and details.