Light passes through the front of the eye (cornea) to the lens. The cornea and the lens help to focus the light rays onto the back of the eye (retina). The cells in the retina absorb and convert the light to electrochemical impulses which are transferred along the optic nerve and then to the brain.
Six cranial nerves innervate motor, sensory, and autonomic structures in the eyes. The six cranial nerves are the optic nerve (CN II), oculomotor nerve (CN III), trochlear nerve (CN IV), trigeminal nerve (CN V), abducens nerve (CN VI), and facial nerve (CN VII).
The eyeball receives arterial blood primarily via the ophthalmic artery. This is a branch of the internal carotid artery, arising immediately distal to the cavernous sinus. The ophthalmic artery gives rise to many branches, which supply different components of the eye.
Possible Effects of a Strike:
severe contusions of the eyeball
serious injury to the inner structure of the eyeball
vascular lesions leading to internal bleeding of the eye
increased eye pressure
tears in the iris
blurring of vision
displacement of the lens
swelling of the retina
damage to the optic nerve
sudden reduction in heart rate
loss of consciousness
cardiac arrest due to oculocardiac reflex (Aschner Phenomenon)
fracture of the orbital bone which can damage nerves and blood vessels