The eye is composed of three parts: the eyeball, the optic pathway, and the ocular appendages, which together constitute the eye and perform and maintain different functions and physiological states of the eye. 1. eyeball: the eyeball mainly contains the wall and the contents of the ball, which is nearly spherical and located at the front of the orbit, surrounded by fatty tissue, connective tissue, and eye muscle. The middle layer is the uvea, and the part closest to the eye is the retina. The entire composition of the eye completes the visual conduction function; 2. Optic pathway: The optic pathway is mainly composed of the optic nerve, optic cross, optic bundle, lateral geniculate body, optic radiation and optic center. The optic pathway starts from the optic nerve and radiates to the visual center of the brain through the optic cross and optic bundle, which, after being stimulated by light, generates nerve impulses and serves as a pathway for visual conduction; 3. Ocular appendages: The ocular appendages include the orbit, eyelids, conjunctiva, lacrimal apparatus, and extraocular muscles. The ocular appendages are individual parts, and the ocular appendages are supported by the internal carotid artery branching off the ophthalmic artery to complete the entire ocular structure and play a supporting role in protection and movement.