rod and cone cells
The retina. This consists of layers of cells that detect light and colour and transmit information to the brain via the optic nerve.
Your eyes detect it, (retina) it is then sent down your optical nerve to the brain
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.
Light from the sun, or other light source, reflects from the tree into your eye. Structures in your eye focus the light onto your retina, which sends nerve signals to your brain. Your brain processes those signals and you "see" the tree.
When light hits the retina (a light-sensitive layer of tissue at the back of the eye), special cells called photoreceptors turn the light into electrical signals. These electrical signals travel from the retina through the optic nerve to the brain. Then the brain turns the signals into the images you see.
detect light to retina
The lens focuses incoming light on the retina (light sensitive cells), which sends signals down the optic nerve, and the brain interprets to sight.
The colours are determined by the wavelengths of the light. How they are perceived depends on the brain interpreting the signals from the retina.
The retina converts light to electric signals used by the occipital cortex of your brain, that is sight. The iris is the black looking part of your eye the expands and contracts to control the amount of light reaching your retina.
Light rays of differing wavelengths enter the eyes and strike the retina which converts them into electrical signals, these signals are sent to the brain where they are reinterpreted as colours and images.
retina
The nerves that transmit messages from the rods and cones are called optic nerves. Rods and cones are specialized cells in the retina of the eye that detect light and convert it into electrical signals. These signals are then transmitted through the optic nerves to the brain, where they are processed and interpreted as visual information.