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Correspondence to: Kittichai Akrapipatkul, Thammasat University E-mail: ktcoph@yahoo.com Received : 13th February 2019 Accepted: 14th March 2019 Published: 10th Novermber 2019 Objective: To estimate the incidence of postoperative development of macular edema among diabetic patients with and without diabetic retinopathy. A comparative study of central macular thickness was performed on this population before and after uncomplicated cataract surgery. Methods: Forty-two diabetic patients with no diabetic retinopathy (no DR) and 23 diabetic patients with diabetic retinopathy (DR) that underwent phacoemulsification with intraocular lens implantation were enrolled in this study from March 2017 to May 2018. Central macular thickness (CMT) was measured with spectral domain optical coherence tomography (OCT). These parameters were recorded before and four-weeks after cataract surgery then analyzed using descriptive statistics. Results: 65 patients consisted of 40 males (61.54%) and 25 females (38.46%). Mean age was 67.01 ± 8.12 years. All 65 patients had diabetes, of which 23 (35.38%) had diabetic retinopathy and 42 (64.62%) did not. Phacoemulsification with posterior chamber intraocular lens implantation were performed in all eyes. No serious intraoperative complications were found. Mean preoperative CMT were 230.10 ± 25.25 and 233.78 ± 28.13 μm in the no DR and DR group respectively (P= 0.705). Mean postoperative CMT were 235.67 ± 27.59 and 239.04 ± 29.68 μm in the no DR and DR group respectively (P= 0.676). Mean CMT increased over the preoperative study 5.57 ± 12.28 μm (2.40%) in the no DR group and 5.26 ± 7.67 μm (3.28 %) in the DR group. The incidence of all postoperative macular edema on spectral domain OCT (CMT > 300 μm) was 1.54%. Conclusion: Central macular thickness in diabetic patients measured by spectral domain OCT increase after uncomplicated phacoemulsification at 4 weeks in both groups but there is no statistically significant difference between the no DR and DR group. Conflicts of interest: The authors report no conflicts of interest.

Macular edema after cataract surgery in diabetic patients evaluated by Spectral domain OCT at Thammasat eye center