<Tr> <Td> III, IV, VI: Oculomotor nerve, Trochlear nerve, Abducens nerve </Td> <Td> Pupillary light reflex <P> The patient stares into the distance as the examiner shines the penlight obliquely into each pupil . Pupillary constriction is tested for on the eye examined (direct response) and on the opposite eye (consensual response). The swinging flashlight test involves moving the light between the two pupils . Normally both direct and consensual responses are ellicited when the light shines on an eye, and some dilation will occur during the swing between . </P> <P> Extraocular movements: First, inspect for ptosis, eye position and nystagmus . The pupil size is measured, its shape and any asymmetry is tested . A commonly used abbreviation to describe normal pupils is PERRLA (pupils equal, round and reactive to light and accommodation). </P> <P> The examiner tests ocular movements by standing one meter in front of the patient and asking the patient to follow a target with eyes only, and not the head . The target is moved in an "H" shape and the patient is asked to report any diplopia . Then, the target is held at the lateral ends of the patient's visual field . Nystagmus is tested for . One or two beats is a normal finding . The accommodation reflex is tested by moving the target towards the patient's nose . As the eyes converge, the pupils should constrict . The optokinetic nystagmus test is optional and involves asking the patient to look at a moving strip of horizontal lines . Nystagmus is normally observed . </P> </Td> <Td> </Td> </Tr> <P> The patient stares into the distance as the examiner shines the penlight obliquely into each pupil . Pupillary constriction is tested for on the eye examined (direct response) and on the opposite eye (consensual response). The swinging flashlight test involves moving the light between the two pupils . Normally both direct and consensual responses are ellicited when the light shines on an eye, and some dilation will occur during the swing between . </P> <P> Extraocular movements: First, inspect for ptosis, eye position and nystagmus . The pupil size is measured, its shape and any asymmetry is tested . A commonly used abbreviation to describe normal pupils is PERRLA (pupils equal, round and reactive to light and accommodation). </P> <P> The examiner tests ocular movements by standing one meter in front of the patient and asking the patient to follow a target with eyes only, and not the head . The target is moved in an "H" shape and the patient is asked to report any diplopia . Then, the target is held at the lateral ends of the patient's visual field . Nystagmus is tested for . One or two beats is a normal finding . The accommodation reflex is tested by moving the target towards the patient's nose . As the eyes converge, the pupils should constrict . The optokinetic nystagmus test is optional and involves asking the patient to look at a moving strip of horizontal lines . Nystagmus is normally observed . </P>

A test for cranial nerve vi would be