21. Optokinetic nystagmus ( OKN ) is nystagmus that occurs in response to a rotation movement. 22. Optokinetic nystagmus ( OKN ) is nystagmus that occurs in response to a rotation movement. 23. Lights seeming to move caused by erratic eye movement ( nystagmus or REM sleep ). 24. This natural bodily reaction, called nystagmus , helps one compensate for an overstimulated vestibular system. 25. She learned the uncontrollable eye movements were caused by nystagmus , which often accompanies ocular albinism. 26. This can be true for people with severe visual impairment, such as the nystagmus ). 27. Nystagmus is also present when the eye on the opposite side of the lesion is abducted.28. Clinical trials of a surgery to treat nystagmus ( known as tenotomy ) concluded in 2001. 29. He developed myopathy, nystagmus , ataxia, upper motor neuron signs, and absence seizures. 30. The lower levels of light associated with safety lamps caused an increase in the incidence of nystagmus .
