There was no significant difference between IOL groups in Rasch-adjusted QoV scores for frequency ( P = 0.95 ) , severity ( P = 0.56 ) , and bothersomeness ( P = 0.34 ) of visual symptoms ; median ( interquartile ) scores for these QoV subscales were 29 ( 15-37 ) , 22 ( 13-27 ) , and 14 ( 0-29 ) for the AT LISA 809M IOL group , respectively , and 32 ( 15-37 ) , 22 ( 13-30 ) , and 14 ( 0-29 ) for the ReSTOR SN6AD1 IOL group , respectively .