Vertical Heterophoria Test. Rotation testing employs the same electrodes or goggles to measure the relationship between the velocity of the head and eyes during whole body rotation Other tests measure function from the vestibular system by exposing the subject to a clicking noise known as the vestibular evoked myogenic potential (VEMP) test The vestibular function tests are administered and interpreted.
When the beneficiary has a high pretest or a prior probability for having the diagnosis of Carpal Tunnel Syndrome the NCstat Vertical heterophoria H5054 Cyclophoria H5055 Alternating heterophoria H5060 Mechanical strabismus unspecified H50611.
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Congenital fourth nerve palsy is a condition present at birth characterized by a vertical misalignment of the eyes due to a weakness or paralysis of the superior oblique muscle Other names for fourth nerve palsy include superior oblique palsy and trochlear nerve palsy When looking to the right/left the nerve/muscle isn’t strong enough or is too long and the eye drifts up.
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If the ocular misalignment manifests only when fusion is disrupted (eg with alternate cover test) it is termed a heterophoria or phoria The coveruncover test is used to demonstrate a tropia Each eye is covered separately Look for movement of the uncovered eye to pick up fixation The alternate cover test detects phorias by breaking fusion Further.