Abstract
Purpose
To compare the changes in macular thickeness between non-diabetic group and a mild or moderate nonproliferative diabetic retinopathy group after phacoemulsification.
Methods
This study consisted of 32 eyes of 22 patients who underwent phacoemulsification. The non-diabetic group included 20 eyes of 15 patients; the diabetic group (mild or moderate nonproliferative diabetic retinopathy) included 12 eyes of 7 patients. Macular thickness using optical coherence tomography (OCT) and corrected visual acuity were measured before surgery and 1 day, 1 week, 1 month, 2 months, 6 months and 12 months after surgery.
Results
In the non-diabetic group, the macular thickness increased by 2.8±4.2% at 1 week, 5.9±4.5% at 1 month, 4.8±3.8% at 2 months, 0.6±0.8% at 6 months, and -0.3±1.2% at 12 months after surgery, while it increased by 4.8±5.0% at 1 week, 11.1±5.2% at one month, 9.9±6.0% at two months, 8.1±4.6% at 6 months, 3.9±3.5% at 12 months in the diabetic group. The increased amount of macular thickness was significantly higher in the diabetic group than in the non-diabetic group at 1 month, 2 months, 6 months, and 12 months. Visual acuity was not significantly different between the diabetic and non-diabetic groups. In the non-diabetic group, 2 months after the operation, LogMAR below 0.02 (Snellen 0.95) were remained with best corrected visual acuity. Similarly to non-diabetic patients, diabetic patients needed 12 months to reach best corrected visual acuity.
Conclusions
Macular thickness increased in both diabetic and non-diabetic groups after phacoemulsification, and the increased amount of macular thickness was significantly greater and lasted longer in the diabetic group compared with the non-diabetic group. In cases of mild or moderate nonproliferative diabetic retinopathy, macular thickness change due to cataract surgery did not influence visual acuity.
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Table 1.
Non-diabetic group (%) | Diabetic group (%) | p-value* | |
---|---|---|---|
1 day | 0.0±2.5 | 0.0±2.7 | 1.000 |
1 week | 2.8±4.2 | 4.8±5.0 | 0.559 |
1 month | 5.9±4.5 | 11.1±5.2 | 0.003 |
2 months | 4.8±3.8 | 9.9±6.0 | 0.021 |
6 months | 0.6±0.8 | 8.1±4.6 | 0.001 |
12 months | -0.3±1.2 | 3.9±3.5 | 0.006 |
Table 2.
Non-diabetic group LogMAR VA (Snellen VA) | Diabetic group LogMAR VA (Snellen VA) | p-value* | |
---|---|---|---|
Preop | 0.35±0.17 (0.46) | 0.35±0.22 (0.46) | 0.803 |
1 day | 0.04±0.09 (0.89) | 0.19±0.17 (0.67) | 0.006 |
1 week | 0.10±0.19 (0.80) | 0.11±0.13 (0.79) | 0.863 |
1 month | 0.05±0.06 (0.87) | 0.09±0.18 (0.81) | 0.687 |
2 months | 0.02±0.04 (0.95) | 0.09±0.20 (0.81) | 0.803 |
6 months | 0.01±0.10 (0.98) | 0.08±0.17(0.84) | 0.784 |
12 months | 0.01±0.09 (0.98) | 0.02±0.11 (0.95) | 0.678 |