Rattlesnakes, however, can detect electromagnetic radiation in the infrared range and use this ability to find prey.
Light passes through the cornea, pupil and lens before hitting the retina.
The iris is a muscle that controls the size of the pupil and therefore, the amount of light that enters the eye. Also, the color of your eyes is determined by the iris. The vitreous or vitreous humor is a clear gel that provides constant pressure to maintain the shape of the eye. The receptors respond to light by generating electrical impulses that travel out of the eye through the optic nerve to the brain . Six bands of muscles attach to the eyeball to control the ability of the eye to look up and down and side to side.