When the position of the head is moved, the otoliths shift, causing the hair cells to bend, and generate a nerve signal. The Semicircular Ducts Rotational acceleration is detected by three endolymph-filled semicircular ducts, each of which houses an ampulla. Within the ampulla is a mound of hair cells with supporting cells called the crista ampullaris. Hair cells are embedded in a gelatinous cupula that responds to motion, bending the stereocilia and stimulating hair cells. More of a fluid movement response Vision and Light Vision is the perception of light.
Light is electromagnetic radiation, measured in wavelengths.
Most solar radiation reaching earth falls within 400-750 nm, the same range the eye is adapted to see. A ciliary body forms a muscular ring around the lens and secretes aqueous humor. The iris controls the diameter of the pupil, and contains chromatophores with varying quantities of pigment. The tunica interna is the retina. The lens is connected to the ciliary body by the suspensory ligament.