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Year : 2018  |  Volume : 31  |  Issue : 1  |  Page : 278-282

Comparison between multispot laser and conventional laser in the treatment of diabetic clinically significant macular edema

1 Department of Ophthalmology, Faculty of Medicine, Menoufia University, Menoufia, Egypt
2 Department of Ophthalmology, Research Institute of Ophthalmology, Giza, Egypt

Correspondence Address:
Kareem M.H. El-Sawah
Zagazig, Sharkia
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1110-2098.234233

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Objectives The purpose of this study was to assess the safety andefficacy of multispot laser and conventional laser in the treatment of nonproliferative diabetic retinopathy with clinically significant macular oedema (CSME)in relation to the visual outcome, central macular thickness(CMT) using optical coherence tomography, and presence of adverse events. Patients and methods This prospective randomized study included a total of 50 eyes from the research institute of ophthalmology in 2015 that were divided into two groups of 25patients each. GroupA patients underwent focal or modified grid macular laser photocoagulation using green laser 532nm. GroupB patients underwent focal or modified grid macular laser photocoagulation using multispot laser photocoagulation Valon TT. Inclusion criteria were as follows: typeII diabetes and clinically significant macular edema. Best-corrected visual acuity(BCVA), optical coherence tomography readings, intraocular pressure (IOP), and adverse events were recorded preoperatively and at 1week, 1month, and 3months postoperatively. Results The mean preoperative BCVA in conventional laser was 0.294±0.17 decimal and that in multispot laser was 0.30±0.21. The mean BCVA 3months after laser in groupA was 0.4820±0.244 decimal(P=0.001) and that in groupB was 0.50±0.20(P=0.001). The mean preoperative CMT in groupA was 375.92±65.69 μm and that in groupB was 361.0±50.400 μm. The mean CMT 3months after laser in groupA was 314.44±85.94 μm(P=0.001) um and that in groupB was 0322.67±57.50 μm(P=0.001). The multispot system parameters used a higher power of 155±90.1 mW(P=0.001) compared with the conventional laser to produce the same therapeutic visible effect. Conclusion Multispot system was safe, rapid, and effective in the treatment of clinically significant macular edema in short-term follow-up periods and had a short exposure time. Although the short pulse duration of the multispot system necessitated the use of a higher power, it was not associated with adverse effects.

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