Table 1. Changes in IOP and number of medications used in both groups.

	Silicone mean±SD	Polypropylene mean±SD	P-value
Preoperative
IOP (mm Hg)	33.8±5.6	34.1±5.9	0.86
Medications (no)	2.93±0.69	2.81±0.73	0.81
Postoperatively
1 Month
IOP (mm Hg)	14.1±5.2	15.2±5.7	0.54
IOP percentage reduction (%)	58±26	55±27	0.66
Medications (no)	0	0	1.00
Three months
IOP (mm Hg)	14.9±5.9	17.2±6.2	0.27
IOP percentage reduction (%)	56±27	50±29	0.43
Medications (no)	0.22±0.54	0.53±0.64	0.03
Sixth months
IOP (mm Hg)	15.1±5.8	19.2±6.7	0.03
IOP percentage reduction (%)	55±27	44±32	0.11
Medications (no)	0.76±1.32	1.12±1.16	0.04
12 months
IOP (mm Hg)	15.8±5.9	19.8±6.2	0.04
IOP percentage reduction (%)	53±27	42±31	0.12
Medications (no)	1.12±1.04	1.56±1.19	0.06
24 months
IOP (mm Hg)	17.6±5.8	20.2±6.6	0.04
IOP percentage reduction (%)	48±27	41±33	0.35
Medications (no)	1.34±1.11	1.67±1.15	0.07

Abbreviation: IOP, intraocular pressure.