1156
METHODS : Three subjects with a history of ethambutol ( EMB ) - induced optic neuropathy of short - , intermediate - , and long - term visual deficits were administered a full neuro - ophthalmologic examination including visual acuity , color vision , contrast sensitivity , and fundus examination .
 Chemical: ethambutol; Chemical: EMB; Disease: optic neuropathy; Disease: visual deficits
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: ethambutol; Chemical: EMB; Disease: optic neuropathy; Disease: visual deficits