Subthreshold micropulse laser and conventional subthreshold laser in diabetic macular edema

Area of Science:

• Ophthalmology
• Retinal Diseases
• Laser Therapy

Background:

• Diabetic macular edema (DME) is a leading cause of vision loss in diabetic patients.
• Subthreshold laser photocoagulation aims to treat DME with reduced thermal damage compared to conventional methods.

Purpose of the Study:

• To compare short-term morphological and visual function changes between subthreshold micropulse laser photocoagulation (SMLP) and conventional subthreshold laser photocoagulation (SLP) in diabetic macular edema (DME).

Main Methods:

• A prospective, paired, randomized controlled trial involving 66 eyes from 33 patients with clinically significant DME.
• Bilateral randomization of eyes to either SMLP or SLP treatment.
• Comprehensive assessments including visual acuity, optical coherence tomography, and microperimetry at baseline and 1, 3, and 6 months.

Main Results:

• No significant differences in best corrected visual acuity (BCVA), central macular thickness (CMT), or macular sensitivity between SMLP and SLP at 6 months.
• Earlier significant reduction in CMT observed in the SMLP group by month 3 compared to the SLP group at month 6.
• No significant differences in central choroidal thickness or fundus autofluorescence (FAF) area changes between groups.

Conclusions:

• SMLP demonstrates comparable efficacy to conventional SLP for DME treatment over a 6-month period.
• SMLP may offer an advantage with earlier CMT reduction and potentially less retinal damage.