790
PURPOSE : To determine the natural history of visual field defects in a group of patients known to have Vigabatrin - associated changes who elected to continue the medication because of good seizure control .
 Disease: visual field defects; Chemical: Vigabatrin; Disease: seizure
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:
 Disease: visual field defects; Chemical: Vigabatrin; Disease: seizure