The term 'EYE COAT' refers to the three layers of the eye: the RETINA, cornea, and sclera. The RETINA is the innermost layer of the eye and is responsible for sensing light and color. The cornea is the transparent outer layer of the eye that helps focus light onto the RETINA. The sclera is the tough, white outer layer of the eye that provides protection and helps maintain the shape of the eye. Together, these three layers form the protective coat of the eye.