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Effect of micropulse diode laser on contrast sensitivity and macular scar formation in diabetic macular edema

Session Details

Session Title: Quick Fire Free Paper 5

Session Date/Time: Sunday 14/09/2014 | 11:00-13:00

Paper Time: 12:05

Venue: Boulevard B

First Author: : M.Hamed EGYPT

Co Author(s): :    M. Bahgat   N. Adel   I. Othman        

Abstract Details


To assess effect of micropulse diode laser (MPDL) on contrast sensitivity measured at 5 spatial frequencies and on macular scar formation during treatment of clinically significant diabetic macular oedema (CSME) as compared to conventional argon green laser (CGL) treatment.


Eye and laser world centre


Twenty four patients (40 eyes) with diabetic CSME were randomly assigned to MPDL (n=20) or CGL (n=40) photocoagulation. All eyes had either focal photocoagulation for localized areas of leakage or a grid pattern applied to areas of diffuse macular edema. Treatments were performed after baseline evaluation and follow up is done at 3 and 6 months and re-treatments were allowed at the 3 month visit if necessary. Parameters noted included contrast sensitivity at 5 spatial frequncies and number of cases having macular scars in color fundus photo.


All patients completed 6 months of follow-up after treatment at baseline. There was no statistically significant difference in contrast sensitivity at 5 spatial frequencies between the two laser modalities at 0, 3 and 6 months. In MPDL group there was statistical significant improvement in contrast sensitivity at spatial frequencies 6 and 12 (p=0.009 and 0.008 respectively) over the 6 months follow up. There was no statistical significant difference at the other spatial frequencies for MPDL group. There was no statistical significant improvement in all spatial frequencies for CGL group. Laser scars were identified at color fundus photo in 40% of CGL-treated eyes and not at any of the MPDL-treated. This difference was statistically significant (p=0.04).


Micropulse diode laser photocoagulation is superior to CGL treatment for CSME regarding contrast sensitivity improvement and macular scar formation.

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