According to Springfield Technical Community College, the visual receptor cells are located at the proximal end of the retina. These cells are called photoreceptor cells.
Photoreceptor cells are known by this name because they receive photons. When light hits the retina, the photons travel through the retina, hitting the photoreceptor cells at the end of it. Overstimulation of the photoreceptor cells is prevented by the adjacent presence of the choroid coat, which absorbs any scattered light that passes by the photoreceptor cells. Rods and cones are the two types of photoreceptor cells, with rods used for peripheral vision in black and white and cones used for central, color vision.Learn More
Betelgeuse is located on the shoulder of the Orion constellation and is one of the brightest stars in the sky. It is classified as a supernova and is predicted to explode within the next million years. Because it is 640 light years away, Betelgeuse is too far for its eventual explosion to cause any damage to Earth.Full Answer >
Eye floaters and flashes can be the result of the retina becoming detached from the inner back of the eye or the vitreous pulling away from the retina, says Marilyn Haddrill of All About Vision. Ordinary eye floaters that are no cause for alarm can also cause these symptoms.Full Answer >
According to The Merck Manual Home Health Handbook, light travels through the sclera, cornea, pupil and lens before stopping at the retina, respectively. Once at the retina, the information from the light is converted to electrical impulses for the brain to interpret.Full Answer >
An image is formed in the human eye when light passes through the pupil, is refracted by the lens and is absorbed by pigment cells in the retina, altering the pigments and triggering neurons to fire. The particular arrangement of the stimulated cells is interpreted by the brain into a separate image for each eye. The two eyes look at images from slightly different angles, allowing the perception of depth.Full Answer >