Introduction
eyelid movements, trigeminal nerve damage, corneal blink reflex
CORNEA
The cornea is one of the tissues with a dense innervation in the human body. Corneal sensory nerves originate predominantly from the ophthalmic branch of the fifth cranial nerve. To maintain a healthy ocular surface, corneal nerves release neurotrophic factors under basal physiological conditions [The ophthalmic branch of the trigeminal nerve can regulate eyelid movements and the secretion of tears through the lacrimal, goblet cells and Meibomian glands by two reflex arcs (the motor and autonomic arcs) [It is vital to thoroughly understand the mechanisms of the blink reflex when discussing trigeminal nerve damage combined with facial nerve damage. The corneal blink reflex is a loop between the facial nerve and the ophthalmic branch of the trigeminal nerve [The aim of this study was to evaluate any differences in ocular surface characteristics between normal eyes, mild and moderate/severe NK eyes. It may help neurosurgeons and ophthalmologists identify potential risk factors early and allow them to intervene in a timely manner.