221
This study assessed the effect of normal aging on ( 1 ) the tropicamide - induced increase in pupil diameter , and ( 2 ) the reversal of this effect with pilocarpine .
 Chemical: tropicamide; Chemical: pilocarpine
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: tropicamide; Chemical: pilocarpine