Back to Journals » Clinical Ophthalmology » Volume 12

Subthreshold microsecond laser for proliferative diabetic retinopathy: a randomized pilot study

Authors Jhingan M, Goud A, Peguda HK, Khodani M, Luttrull JK, Chhablani J

Received 4 June 2017

Accepted for publication 12 October 2017

Published 15 January 2018 Volume 2018:12 Pages 141—145

DOI https://doi.org/10.2147/OPTH.S143206

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Colin Mak

Peer reviewer comments 4

Editor who approved publication: Dr Scott Fraser


Mahima Jhingan,1 Abhilash Goud,1 Hari Kumar Peguda,1 Mitali Khodani,1 Jeffrey K Luttrull,2 Jay Chhablani1

1L V Prasad Eye Institute, Kallam Anji Reddy Campus, Hyderabad, India; 2Ventura County Retina Vitreous Medical Group, CA, USA

Aim: To compare the outcomes of subthreshold microsecond (STM) and continuous-wave laser (CWL) panretinal photocoagulation (PRP).
Methods: In this randomized, prospective, pilot study, 20 eyes of 10 subjects with symmetric severe non-proliferative (NPDR) or low-risk proliferative diabetic retinopathy (PDR) were included. Each eye of the subject was randomized into either CWL or STM PRP group. Patients were evaluated at baseline and at months 3, 6, and 9 with color fundus photographs and visual field tests at each visit; however, electroretinography (ERG) was conducted at baseline and at month 9. The primary outcome measure was the difference in disease progression between the groups. Secondary outcome measures included change in visual acuity, contrast visual acuity, retinal sensitivity on visual field test, and change in ERG parameters.
Results: During the 9-month follow-up, one eye of the STM group progressed to vitreous hemorrhage at the month 6 follow-up and required rescue conventional laser. The CWL group showed a drop in low-contrast visual acuity, visual field index, and scotopic b/a ratio in comparison to the STM group, although the difference was statistically insignificant (p>0.05).
Conclusion: This prospective pilot study proposes microsecond PRP is non-inferior to CWL PRP and could be an alternative to CWL PRP to avoid associated complications in cases of severe NPDR and early PDR.

Keywords: panretinal photocoagulation, diabetic retinopathy, proliferative diabetic retinopathy, micropulse laser, microsecond laser
 

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]  View Full Text [HTML][Machine readable]