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A member asked:
Action of superior oblique eye muscle is down and out, but h test diagram show so down and in. why the seeming discreptancy?
A doctor has provided 1 answer
The SO has...: Maximum depression when the lr is contracted. However its pure function is internal rotation, therefore if cn 4 were out only the so would be out. This would eliminate internal rotation that could not be compensated by medial rectus and inferior rectus.
Answered 4/18/2016
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