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Evaluation of Transcutaneous Electrical Simulation to Improve Recovery From Corneal Hypoesthesia After Lasik Publisher Pubmed



Ghaffariyeh A1 ; Peyman A2 ; Puyan S1 ; Honarpisheh N1 ; Bagheri B1 ; Peyman M2, 3
Authors
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Authors Affiliations
  1. 1. Khodadoust Eye Hospital, Shiraz Fars, Motahari Avenue, Iran
  2. 2. Department of Ophthalmology, Isfahan University of Medical Sciences and Health Services, Isfahan, Iran
  3. 3. Department of Ophthalmology, University of Malaya, Kuala Lumpur, Malaysia

Source: Graefe's Archive for Clinical and Experimental Ophthalmology Published:2009


Abstract

Purpose: To evaluate the efficacy, and safety of transcutaneous electrical stimulation (TES) to accelerate corneal nerve regeneration and improved recovery from corneal hypesthasia after laser-assisted in situ keratomileusis (LASIK). Setting: Khodadoust Eye Hospital, Shiraz, Fars, Iran Methods: This prospective, randomized, clinical study comprised 40 eyes of 20 patients scheduled to undergo bilateral LASIK. In each patient, one eye was randomly assigned to receive transcutaneous electrical stimulation (20 HZ) for 60 minutes, and the other eye allocated as control. Corneal sensitivity was measured using the Cochet-Bonnet esthesiometer in four areas outside and five areas inside the LASIK flap preoperatively, and at 1 day, 1 week, 1 month, and 3 months postoperatively. Best-corrected visual acuity and the incidence of adverse events were noted at each visit. Results: For all four points outside the LASIK flap, normal corneal sensitivity was maintained throughout the study; no significant difference was found between the study eyes and the control eyes at these points (P>0.05). All points within the LASIK flap except the point closest to the hinge demonstrated profound corneal hypoesthesia at 1 day, 1 week, and 1 month postoperatively, with no differences noted between the control and study eyes (P>0.05). After 3 months, points within the flap had statistically significantly better corneal sensitivity in the study group than in the control group (P<0.05). Conclusions: Transcutaneous electrical stimulation significantly improves corneal sensitivity at 3 months after LASIK. This may be due to accelerated corneal nerve regeneration by electrical stimulation. © Springer-Verlag 2009.
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