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Minimal intensity diode laser (810 nanometer) photocoagulation (MIP) for diffuse diabetic macular edema (DDME)
1The Retina Center of St. Louis County, 11710 Old Ballas Rd., Suite 102, St. Louis, MO 63141, USA.
Background And Objective:
To determine the effectiveness of minimal intensity diode laser (810nm) photocoagulation (MIP) for diffuse diabetic macular edema (DDME).
Methods:
Patients demonstrating diffuse diabetic macular edema (DDME) were treated with minimal intensity diode 810 laser photocoagulation or modified grid photocoagulation consecutively. Patients were seen and reevaluated at regular follow up visits every 3 to 4 months and retreated if residual diffuse diabetic macular edema was still present. Selected patients were tested with Goldmann visual field, pre and post-treatment. Visual improvement, visual loss, visual field, reduction/elimination of macular edema, and a number of treatments were studied.
Results:
Reduction/elimination of DDME was observed in approximately 74% of eyes with 24 months follow up. The number of treatments per eye ranged from 1 to 5. The presence of cystoid macular edema, initial poor visual acuity, the presence of coexisting macular ischemia, or a history of systemic hypertension did not effect the outcome. Patients without a history of systemic vascular disease had a better chance of visual stabilization or improvement compared to those patients with a history of systemic vascular disease. Eighty-eight percent of patients had at least stable visual acuity at the last follow up visit. No post-treatment subjective complaints of increased pericentral scotomas were encountered in this group of patients and post-treatment atrophic scarring was substantially reduced, by using minimal intensity diode laser 810 photocoagulation, compared to eyes previously treated with shorter wavelengths and more visible burns.
Conclusion:
Minimal intensity diode laser 810nm modified grid laser photocoagulation for diffuse diabetic macular edema (DDME) is effective in reducing/eliminating DDME, although resolution of edema may be slightly prolonged and may require 1 or 2 additional treatments compared to eyes previously treated with shorter wavelengths and more visible burns. However, this method appears to be advantageous in that it appears to reduce the objective and subjective effect on the pericentral visual field, as well as substantially reducing the post-treatment atrophic scarring seen in patients treated with shorter wavelength lasers and move visible burns.
Insights
Minimal intensity diode laser (810nm) photocoagulation effectively treats diffuse diabetic macular edema (DDME), reducing or eliminating it in 74% of cases. This method offers improved visual field preservation and reduced scarring compared to older laser treatments.
Area of Science:
- Ophthalmology
- Diabetic Retinopathy Treatment
- Laser Photocoagulation
Background:
- Diabetic macular edema (DDME) is a leading cause of vision loss in diabetic patients.
- Current treatments for DDME have limitations, including potential visual field defects and scarring.
Observation:
- This study evaluated minimal intensity diode laser (810nm) photocoagulation (MIP) for DDME.
- Patients received MIP or modified grid photocoagulation, with follow-up every 3-4 months.
- Visual acuity, visual fields, macular edema reduction, and treatment number were assessed.
Findings:
- MIP achieved reduction/elimination of DDME in approximately 74% of eyes within 24 months.
- Eighty-eight percent of patients maintained stable visual acuity.
- Factors like cystoid edema, poor initial acuity, macular ischemia, or hypertension did not negatively impact outcomes.
- Patients without systemic vascular disease showed better visual stabilization or improvement.
- MIP resulted in significantly reduced atrophic scarring and fewer pericentral visual field complaints compared to shorter wavelength lasers.
Implications:
- Minimal intensity diode laser (810nm) photocoagulation is an effective treatment for DDME.
- This technique offers advantages in preserving visual field function and minimizing retinal scarring.
- While resolution may be slightly prolonged, MIP presents a safer alternative for managing DDME.
