How does the eye form an image on the retina?
Light waves from an object are reflected on the pupil through the cornea. The pupil constricts to accommodate the required light response for optimum vision. The bent light waves are reflected on the crystalline lens and nodal point, located behind the eye lens surface. Here, the image is reversed and inverted, before passing in ‘clear focus’ on to the retina. The retina registers tiny photons of light and turns light impulses into electrical signals. These signals are sent via the optic nerve, to the occipital cortex. Here the electrical signals are interpreted as a visual image.
