J Korean Acad Rehabil Med.  2002 Dec;26(6):734-738.

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

• Lee SM
• Kim C
• Ahn JK

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.

Keyword

Refraction; Acuity; VEP; P100 latency

MeSH Terms

Evoked Potentials, Visual*
Humans
Male
Myopia*
Visual Acuity