797
CONCLUSION : Established visual field defects presumed to be due to Vigabatrin therapy did not usually progress in spite of continuing use of the medication .
 Disease: visual field defects; Chemical: Vigabatrin
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