How do you see with your eye?

Answer 1

The light pattern from outside enters your eye through the pupil. The size of the pupil is decided by the iris. This changes how much light is let in. At night, more is let in so it is bigger. The light now enters the lens which focuses the light onto the retina where the rods and cones are present. However, the lens flips the light upside-down. It is later converted by the brain. The rods and cones detect the light on the retina and transfer it into electrical signals. These signals are now sent to the brain via the optic nerve.