The cone and rod photoreceptors are extremely sensitive cells that respond to light by lengthening or shortening their outer segments (OS).

Vertebrate retinas contain photoreceptor cells that convert light into neural signals. These photoreceptors come in two main ...

Light passes through the eyeball to the retina. There are two main types of light receptors called rods and cones. Rods are more sensitive to light than cones so they are useful for seeing in dim ...