1248
In this study, we report on three individual patients who received BTX-B and who subsequently developed parasympathetic dysfunction of the visual system after injections of BTX-B at remote sites.
 adverse event: developed 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: developed 