The Change of Visual Evoked Potential in Patients with Myopia in Correction of Refraction.

, Lee, Seong Min; , Kim, Chul; , Ahn, Jae Ki

Original Article

Journal of the Korean Academy of Rehabilitation Medicine 2002;26(6):734-738.

Lee, Seong Min , Kim, Chul , Ahn, Jae Ki

Department of Rehabilitation Medicine, Inje University College of Medicine, Korea. rehrf@freechal.com

성인 근시 환자의 굴절률 변화에 의한 시각유발전위의 잠시 변화

이성민·김철·안재기

인제대학교 의과대학 상계백병원 재활의학교실

Abstract

Objective
Multiple factors including age, sex, habituation, refraction, cooperation and technical variables are associated with P100 latency of Visual evoked potential (VEP). So we tried to evaluate the P100 latency of visual evoked potential according to refraction.
Method
We studied 28 patients (12 males, 16 females) with myopia. Subjects were divided into 3 groups (mild, moderate, severe myopia) according to refraction and we evaluated the results of VEP studies.
Results
Mean values of refraction and latency (P100) of naked eyes were ⁣4.27 D, 103.95 msec. and those of corrected eyes (in glasses) were ⁣0.25 D, 100.59 msec. Respectively, in mild, moderate and severe myopia, the each P100 latency of naked eyes were 101.27 msec, 102.59 msec, 107.99 msec and those of corrected eyes were 98.33 msec, 100.58 msec, 102.19 msec respectively (p＜0.05). There was significant negative correlation between refraction and P100 latency in myopia.
Conclusion
Our results suggested that there were significant changes in VEP (P100 latency) according to refraction. In performing the VEP study, we should consider the refraction and visual acuity. (J Korean Acad Rehab Med 2002; 26: 734-738)

Key Words: Refraction, Acuity, VEP, P100 latency