Ask the patient to cover one eye and read the letters from the lowest line they can see.
If patients have acute vertigo during the examination, nystagmus is usually apparent during inspection.
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People with blond hair tend to have paler retinae than those with darker hair.
The vestibular nerve is responsible for innervation of the organ of equilibrium balance and the cochlear nerve is responsible for hearing audition.
Better still, a mydriatic agent such as 1% homatropine eye drops can be used, provided that the patient does not have to drive for the rest of the day.