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Posters

Pain response of short exposure time (light) photocoagulation vs conventional photocoagulation in diabetic retinopathy

Poster Details

First Author: M.Guzey TURKEY

Co Author(s):                      0   0 0   0 0   0 0   0 0

Abstract Details



Purpose:

To compare the pain responses were following short exposure time (light) photocoagulation (LP) and conventional photocoagulation (CP) using a 532 nm Frequency Doubled Nd: YAG Laser in patients with diabetic retinopathy.

Setting:

94 eyes of 47 patients with symmetrical severe non-proliferative or proliferative diabetic retinopathy were enrolled in a single-centre randomized clinical trial. One eye of each patient was randomized to LP and the fellow eye to undergo CP therapy.

Methods:

LP used 50 ms exposure time, power sufficient to visible mild grey retinal burns. The fellow eyes were treated CP using 150 ms exposure time and sufficient power level to have similar biomicroscopic retinal effect. Spot size of 150 µm was used in both therapy techniques. Patients were asked to evaluate the pain response with 5-point grading system [0 (no pain) to 4 (most severe pain)].

Results:

Average pain score was 1.2±0.3 in LP group and 2.0±0.6 in CP study group (p<0.01). The LP technique needed a mean power of 458±157 mW, whereas the CP technique used 243±88 mW (p<0.001).

Conclusions:

Patient tolerance of LP with short exposure time was high and LP was associated with significantly lower scores of pain. Shortening exposure time may decrease the pain score with similar retinal effectivity.

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