Heimann-Bielschowsky phenomenon (HBP) refers to unilateral vertical nystagmoid eye movements associated with long-standing monocular poor vision. The monocular vertical oscillations of HBP occasionally have large amplitudes and may be cosmetically objectionable and/or functionally disturbing. We report 2 cases of HBP in which recession of the superior rectus, inferior rectus, and inferior oblique muscles were successful in ameliorating the amplitude of oscillations.
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