Journal List > J Korean Ophthalmol Soc > v.53(10) > 1009199

An, Park, and Kwon: The Changes in Central Macular Thickness after Cataract Surgery in Patients with Diabetic Retinopathy

Abstract

Purpose

To evaluate the changes in central macular thickness (CMT) and incidence of macular edema (ME) after cataract surgery in diabetic patients compared with non-diabetic patients using optical coherence tomography (OCT).

Methods

The records of 138 diabetic patients and 34 non-diabetic patients who underwent cataract surgery were retrospectively reviewed. The diabetic group was divided into 5 groups according to severity of diabetic retinopathy. The diabetic group was also divided into 2 groups depending on prior panretinal photocoagulation history. The changes in CMT were examined using OCT before cataract surgery and 1 week, 1-, 2- and 6-months after surgery in diabetic and non-diabetic patients.

Results

The incidence of ME in the diabetic group and non-diabetic group was 19.6% and 2.9% respectively. The increased amount of CMT (ΔCMT) was significantly greater in the diabetic group compared with the non-diabetic group during the observation period (p < 0.05). The ΔCMT of eyes without a history of panretinal photocoagulation was statistically greater compared to the eyes with a history of panretinal photocoagulation at 1-, 2- and 6-months after cataract surgery (p = 0.005, 0.002, 0.008, respectively).

Conclusions

The ΔCMT and incidence of ME were significantly greater in the diabetic group compared with the non-diabetic group. Additionally, the incidence of ME was significantly greater depending on severity of diabetic retinopathy in the diabetic group.

Figures and Tables

Figure 1
The change in mean central macular thickness in diabetic patient group and non-diabetic patient group after cataract surgery. Paired t-test (p < 0.05). Wilcoxon signed rank test (p < 0.05). POD = postoperative day; NPDR = nonproliferative diabetic retinopathy; PDR = proliferative diabetic retinopathy; CMT = central macular thickness.
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Figure 2
The change in postoperative mean central macular thickness compared to preoperative mean central macular thickness (Post Op. CMT / Pre Op. CMT) in diabetic patient group and non-diabetic patient group after cataract surgery. Student t-test (p < 0.05). Mann-Whitney U test (p < 0.05). POD = postoperative day; NPDR = nonproliferative diabetic retinopathy; CMT = central macular thickness.
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Figure 3
The change in postoperative mean central macular thickness compared to preoperative mean central macular thickness (Post Op. CMT / Pre Op. CMT) in eyes with and without prior panretinal photocoagulation after cataract surgery. Student t-test (p < 0.05). Mann-Whitney U test (p < 0.05). POD = postoperative day; PRP = panretinal photocoagulation; CMT = central macular thickness.
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Table 1
Demographics
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NPDR = nonproliferative diabetic retinopathy; PDR = proliferative diabetic retinopathy; CMT = central macular thickness.

*Student t-test (p < 0.05); Chi-square test (p < 0.05).

Table 2
The change in mean central macular thickness in diabetic patient group and non-diabetic patient group after cataract surgery
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POD = postoperative day; NPDR = nonproliferative diabetic retinopathy; PDR = proliferative diabetic retinopathy; CMT = central macular thickness.

*Paired t-test (p < 0.05); Wilcoxon signed rank test (p < 0.05).

Table 3
Incidence of macular edema after cataract surgery
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NPDR = nonproliferative diabetic retinopathy; PDR = proliferative diabetic retinopathy; PRP = panretinal photocoagulation.

Table 4
Time of incidence of macular edema after cataract surgery
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NPDR = nonproliferative diabetic retinopathy; PDR = proliferative diabetic retinopathy; PRP = panretinal photocoagulation.

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