Passos RM, Belucio-Neto J, Xavier CO, Novais EA, Maia M, Farah ME. Comparison of 577-nm Multispot and Standard Single-Spot Photocoagulation for Diabetic Retinopathy.
Ophthalmologica 2018;
241:202-210. [PMID:
30332674 DOI:
10.1159/000493280]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 08/27/2018] [Indexed: 11/19/2022]
Abstract
OBJECTIVE
To compare two different laser strategies of panretinal photocoagulation for diabetic retinopathy.
METHODS
Single-center, randomized study including 41 eyes treated with 577-nm multispot laser with a 20-ms pulse duration (group 1) or a 532-nm single-spot laser with a 100-ms pulse duration (group 2). The outcomes included best-corrected visual acuity (BCVA) and imaging changes at baseline, 6 and 12 months, laser parameters, and results of subjective pain analysis.
RESULTS
At 12 months, the treatments did not differ significantly in BCVA, central retinal thicknesses (CRTs), improved macular edema, vitreomacular interface changes, patient-reported pain scores, or angiographic responses. Group 1 had significantly fewer treatment sessions but used more laser spots (p < 0.001).
CONCLUSION
The multispot laser required fewer applications with more spots delivered to compensate for lower fluency, showing similar patient tolerance to single-spot laser. Both groups maintained the initial visual acuities and CRTs; about 50% of cases had vitreomacular interface changes and improved macular edema, with similar angiographic improvements after 12 months.
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