As we know our eyes can see probably everything if light bounces on it but some people still have questions. How do eyes see? Why do eyes need light? How do eyes detect colour? Well there's always an answer!
First of light travels from the light source to an object and that light bounces into your eye. Now your most outer eye parts is the cornea, the cornea focuses light into one specific spot and reflect it into your black spot it is called the pupil which regulates the amount of light that enters the eye there is also an eye part called iris which lets in much or less light. When it has high light outside of you the iris will close to not let your eyes irritate but if there's not much light your iris will open to let in as much light as possible on the back of your pupil there is an eye part called lens which focuses light from your pupil. And the last eye part, the retina which will detect light and colour the retina has rods and cones The rods have low light sensitivity and detect light but the cones have high sensitivity of detecting colour. When the picture is finished the picture is transmitted into the brain