Washed out mean DIOP in the Hydrus plus CS group was significantly lower at 24 months compared with the CS group ( 16.93.3 mmHg vs. 19.24.7 mmHg ; P = 0.0093 ) , and the proportion of patients using no hypotensive medications was significantly higher at 24 months in the Hydrus plus CS group ( 73 % vs. 38 % ; P = 0.0008 ) .