2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Disorders Of The Eye And Adnexa 360-379 > Visual Disturbances 368.* > 2006 ICD-9-CM Diagnosis 368.6 Night blindness View the most recent version of ICD-9-CM 368.6 Failure or imperfection of vision at night or in dim light, with good vision only on bright days. 368.6 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 368.* hierarchy