T H E NYSTAGMUS COMPENSATION (BLOCKAGE) SYNDROME G U N T E R K. V O N N O O R D E N , Houston, Texas M.D. Congenital nystagmus with a neutral zone in dextroversion or levoversion is a well-recognized entity; binocular func tions are preserved and surgical treatment has been successful. 1,2 A less well-known but frequently encountered form of con genital nystagmus is invariably accompa …
