Lenz Law is a way to find the direction of induced current in a conducting loop. As per Faraday's Law of electromagnetic induction, a current is induced in a conducting loop by the changing magnetic flux. This induced current itself produces a magnetic field and hence a magnetic flux.
Quick Answer. The corneal reflex is an involuntary closing of the eyelids when the cornea is touched by a foreign object. The function of this reflex is to protect the eye from damage. Absence of a corneal reflex may indicate damage to the fifth and seventh cranial nerves, which mediate the reflex.
corneal reflex, a protective mechanism for the eye in which the eyelids close when the cornea is touched. This reflex is mediated by the ophthalmic division of the fifth cranial nerve (sensory) and seventh cranial nerve (motor) and may be used as a test of integrity of those nerves.