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OKN (optokinetic nystagmus) calibration error

See "blunders"

Optokinetic nystagmus intrinsically cannot go faster than the stimulus. When it does, there nearly always is a calibration error.

OKN calibration error

This person has OKN gain of 1.57. Something is wrong -- either the eyes are wrongly calibrated, or the drum is wrongly calibrated.

 

Copyright August 3, 2016 , Timothy C. Hain, M.D. All rights reserved. Last saved on August 3, 2016