Note 11 The Eye The eye is an optical instrument. Optical instrument have primarily three parts to them. There is a part that interacts with the light to form a usable image. There is a part that collects the light. There is the part that interprets or analyze the image.
How Does the Eye Work? The human eye is made of a variable focal length converging lens. It shapes the light from the outside into an image that falls onto the retina. The retina is a group of cells that convert the light signal into an electrical signals that is then sent to the brain through the optic nerve.
retina lens optic nerve