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       XXIX Annual Congress of the Iranian Society of Ophthalmology        بـیــست و نهمین کنــگــره سـالیـانه انـجـمـن چـشـم پـزشـکی ایـــران
مقاله Abstract


Title: Visual evoked potentials after panretinal photocoagulation in patients with proliferative diabetic retinopathy
Author(s): Mirzajani A, Khojasteh H, Amini Vishte R
Presentation Type: Poster
Subject: Posterior Segment
Others:
Presenting Author:
Name: Ali Mirzajani
Affiliation :(optional) Iran University of Medical Sciences
E mail: mirzajani.a@iums.ac.ir
Phone: 02188223400
Mobile: 09123897841
Purpose:

To evaluate the changes of latency and amplitudes of pattern-reversal visual evoked potentials (PRVEP) in patients with proliferative diabetic retinopathy after panretinal photocoagulation (PRP).

Methods:

PRVEP was recorded in 21 eyes of 21 patients with proliferative diabetic retinopathy prior to, 1 week after every sessions of laser therapy and 1.5 months after the final treatment. Results were compared between pre and post laser treatment sessions in the study group and paired t-test was used for statistical analysis.

Results:

The P100 amplitude showed a significant difference among all treatment sessions with a decreasing trend in the study group after PRP (P<0.001). Also, P100 latency evaluation showed a significant increase after PRP in the study group in all post-PRP sessions (P<0.05). However, 1.5 months after laser treatment, an increase in amplitudes (P<0.001) and a decrease in latencies (P<0.001) of PRVEP were observed and the magnitudes of the parameters approximately returned to their baseline values.

Conclusion:

Although decreasing changes in the amplitude and increasing changes in the latency of PRVEP were observed after laser treatment in proliferative diabetic retinopathy patients, one and a half months after the completion of laser therapy, partial recovery of these parameters values was observed.

Attachment: 143.pptx





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