Patients assigned to the phaco-trabeculectomy group experienced a @ mmHg -LSB- @ % CI : -@ to -@ -RSB- reduction in IOP , a @ dB -LSB- @ % CI : -@ to @ -RSB- improvement in visual fields MD , a @ -LSB- @ % CI : -@ to -@ -RSB- reduction in the number of glaucoma medications needed postoperatively , while the visual acuity improvement was similar between the two groups .