| The process from light to image starts when light is sent from the sun, light bulb, etc. The light rays hit the objects and only the color of the object bounces off and enters our eyes. The light rays travel through the cornea, aqueous humor, pupil, lens, vitreous humor, then passes through the retina. As the light rays passes through the retina, it excites the photoreceptor cells (below). When the photoreceptors are excited, they send electrical impulses of the light rays to the middle of the brain (lateral geniculate nucleus). The brain receives the signals and flips it over, since the electrical impulses are upside down, and there we "see" the image. |
