There was no significant difference in the overall postoperative cost [ median ( interquartile range ) ; $ 485 ( 337 , 822 ) vs. $ 609 ( 387 , 820 ) , P = 0.78 ] , cost of follow-up visits [ $ 303 ( 275 , 358 ) vs. $ 317 ( 275 , 385 ) , P = 0.75 ] , additional procedures [ $ 182 ( 0 , 365 ) vs. $ 182 ( 0 , 365 ) , P = 0.69 ] , or glaucoma medication [ $ 0 ( 0 , 68 ) vs. $ 0 ( 0 , 90 ) , P = 0.8 ] for Ex-PRESS versus trabeculectomy , respectively .