**7. Relationship between intraocular pressure before surgery and at 12 months after surgery**

Figure 3 shows the relationship between intraocular pressure before surgery and 12 months after surgery. In both groups, there was a significant increase in the intraocular pressure reduction in relation to an increase in preoperative intraocular pressure (mm Hg: P < 0.0001 in both groups; %: P < 0.0001 in the trabeculotomy group, P = 0.1 in the trabeculectomy group). In the trabeculotomy group, patients with higher preoperative intraocular pressure showed a significantly higher intraocular pressure at 12 months postoperatively (P < 0.0001), although there was no significant correlation between them in the trabeculectomy group (P = 0.2) (Figure 3). At 12 months, 8 eyes (19.0 %) in the trabeculotomy group and 23 eyes (57.5 %) in the trabeculectomy group achieved an intraocular pressure of less than or equal to 12 mm Hg, and there was a significant difference between the two groups (P = 0.0211) (Table 3).

**Figure 3.** Trabeculotomy

6 months -46.6 ± 6.7

9 months -45.8 ± 7.4

12 months -46.1 ± 6.9

Parenthesis indicates a range.

98 Advances in Eye Surgery

Number of anti-glaucomatous

Number of anti-glaucomatous

Parenthesis indicates a range.

**Table 3.** Surgical outcome at 12 months

**months after surgery**

medication

medications

**Table 2.** Intraocular pressure change

(-63.2 - -36.0)

(-60.9 - -29.2)

(-60.9 - -33.3)

**Trabeculotomy augmented by postoperative medication group**

**Baseline**

**At 12 months**

Intraocular pressure 27.9 ± 5.4 (23 – 46) 28.3 ± 4.2 (23 – 42) 0.7

Intraocular pressure 14.9 ± 2.0 (12 – 20) 13.9 ± 4.2 (8 – 25) 0.1 Success 42 (100.0 %) 37 (92.5 %) 0.1

<16 mmHg 37 (84.0 %) 33 (82.5 %) 0.5 <12 mmHg 8 (19.0 %) 23 (57.5 %) 0.0211

**7. Relationship between intraocular pressure before surgery and at 12**

Figure 3 shows the relationship between intraocular pressure before surgery and 12 months after surgery. In both groups, there was a significant increase in the intraocular pressure reduction in relation to an increase in preoperative intraocular pressure (mm Hg: P < 0.0001 in both groups; %: P < 0.0001 in the trabeculotomy group, P = 0.1 in the trabeculectomy group). In the trabeculotomy group, patients with higher preoperative intraocular pressure showed a significantly higher intraocular pressure at 12 months postoperatively (P < 0.0001), although

Failure 0 (0 %) 3 (7.5 %)




3.1 ± 0.7 (2 to 4) 3.2 ± 0.7 (2 to 4) 0.9

3.0 ± 0.0 (3) 0.5 ± 0.9 (0 - 3) <0.0001

**Trabeculectomy group P**

0.0003

0.0023

0.1

#### **8. Postoperative intraocular pressure-lowering procedures**

In the trabeculectomy group, 15 patients (37.5 %) received laser suture lysis, 6 patients (15.0 %) underwent needling procedure, and 3 patients (7.5 %) underwent additional surgery, although no patients in the trabeculotomy group received any postoperative intervention except for topical medical treatment (Table 4).


**Table 4.** Postoperative intraocular pressure-lowering procedure
