Clinical Ophthalmology (Aug 2019)

Visual evoked potentials after panretinal photocoagulation in patients with proliferative diabetic retinopathy

  • Amini Vishte R,
  • Mirzajani A,
  • Khojasteh H

Journal volume & issue
Vol. Volume 13
pp. 1635 – 1640

Abstract

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Rasoul Amini Vishte,1 Ali Mirzajani,1 Hassan Khojasteh21Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran; 2Department of Ophthalmology, Farabi Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, IranCorrespondence: Ali MirzajaniDepartment of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, No. 24 flat 2, 13th Alley, Behzad Hesari St., Mirdamad Ave., Tehran, IranTel +98 212 290 9608Fax +98 212 222 0946; +98 212 291 3036Email [email protected]: 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.Keywords: photocoagulation, visual evoked potential, proliferative diabetic retinopathy

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