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Abstract
Purpose
In the present study we compared the intraocular pressure (IOP) after cataract surgery according to incisional techniques.
Methods
Patients who underwent phacoemulsification with intraocular lens implantation were divided into 2 groups: clear corneal incision group (CC group), and scleral tunnel incision group (ST group). All complicated cases were excluded. IOP was measured preoperatively and at 1 week, 1, 3, 6, 12, 18 and 24 months after surgery.
Results
Seventy-seven patients (100 eyes) were enrolled in the present study; CC group (28 patients, 33 eyes), ST group (49 patients 67 eyes). Preoperative IOPs in both groups were not significantly different (p = 0.908, student’s t-test). IOP in the CC group at 1 week after surgery significantly decreased 2.22 ± 2.57 mm Hg compared to preoperative IOP (p < 0.001, repeated-measures ANOVA with post hoc analysis), and the IOP of the ST group decreased 2.11 ± 2.50 mm Hg (p < 0.001, repeated-measures ANOVA with post hoc analysis). The lowered IOP was maintained for 24 months postoperatively. There was no significant difference in IOP change after surgery depending on incisional techniques (p = 0.848, repeated measures ANOVA).
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Figure 1.
Intraocular pressure change after surgery showed no significant difference between clear corneal incision group (CC group) and sclera tunnel incision group (ST group).
Table 1.
Demographic data of patients
| Clear corneal incision group (n = 33) | Scleral tunnel incision group (n = 67) | p-value | |
|---|---|---|---|
| Sex | |||
| Female | 18 | 47 | 0.180* |
| Male | 15 | 20 | |
| Mean age ± SD (years) | 65.27 ± 9.95 | 67.07 ± 9.27 | 0.375† |
| Right : Left | 16:17 | 30:37 | 0.509* |
| Corneal astigmatism (diopter) | -0.39 ± 1.05 | -0.17 ± 1.24 | 0.414† |
Table 2.
Intraocular pressure of patients
| Clear corneal incision group (mm Hg) | p-value* | Scleral tunnel incision group (mm Hg) | p-value* | |
|---|---|---|---|---|
| Preoperative | 15.48 ± 3.54 | 15.40 ± 2.74 | ||
| Postop 1 week | 13.31 ± 3.43 | <0.001 | 13.34 ± 2.96 | <0.001 |
| Postop 1 month | 12.73 ± 3.38 | <0.001 | 12.76 ± 2.95 | <0.001 |
| Postop 3 months | 12.52 ± 2.87 | <0.001 | 12.13 ± 2.65 | <0.001 |
| Postop 6 months | 12.57 ± 2.39 | 0.001 | 13.23 ± 2.92 | <0.001 |
| Postop 12 months | 13.95 ± 3.96 | 0.006 | 13.20 ± 3.15 | <0.001 |
| Postop 18 months | 13.04 ± 3.68 | 0.003 | 13.76 ± 2.69 | <0.001 |
| Postop 24 months | 14.19 ± 3.22 | 0.016 | 13.65 ± 3.02 | <0.001 |
Table 3.
Corneal astigmatism of patients
| Clear corneal incision group (D) | p-value* | Scleral tunnel incision group (D) | p-value* | |
|---|---|---|---|---|
| Preoperative | -0.39 ± 1.05 | -0.17 ± 1.24 | ||
| Postop 1 week | -0.41 ± 1.13 | 0.884 | -0.17 ± 1.31 | 0.622 |
| Postop 1 month | -0.22 ± 1.23 | 0.493 | -0.16 ± 1.33 | 0.456 |
| Postop 3 months | -0.28 ± 1.36 | 0.233 | 0.36 ± 1.39 | 0.526 |
| Postop 6 months | -0.50 ± 1.23 | 0.788 | 0.04 ± 1.35 | 0.431 |
| Postop 12 months | -0.06 ± 1.22 | 0.258 | -0.43 ± 1.59 | 0.082 |
| Postop 18 months | -0.08 ± 1.28 | 0.289 | 0.48 ± 1.29 | 0.297 |
| Postop 24 months | 0.03 ± 0.78 | 0.580 | -0.39 ± 1.28 | 0.864 |
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