<prompt> A person has inability to look downward and laterally. The nerve injured is: September 2012OcculomotorTrochlearAbducentTrigeminal  <response>: Ans. B i.e. Trochlear Cranial nerves related to ophthalmology 3rd cranial nerve: - Supplies all extra-ocular muscle EXCEPT superior oblique lateral rectus, Complete paralysis results in external ophthalmoplegia Inability to move the eye upward, inward downward, - Drooping of the upper eyelids due to paralysis of levator palpabrae superioris ptosis, - Pupillary sparing is a feature of DM 4th cranial nerve: - Weakness paralysis of superior oblique muscle; - Which normally moves the eye downwards inwards 6th cranial nerve: - Weaknessparalysis of lateral rectus; - Which normally rotates the eye laterally 