[Visual evoked potentials in patients with refraction amblyopia in the presence of high myopia]

The informative value of a method for assessing the degree of amblyopia, developed by the author, was assessed in examinations of 16 children (29 eyes) with ametropic amblyopia caused by high myopia and 41 healthy controls. The method consists in recording the pattern-reversal visual evoked potentials (VEP) evoked by 4 patterns of different checksize and contrast. A relationship has been revealed between the VEP types detected by the proposed method and the degree of amblyopia (degree of vision acuity loss). The author came to a conclusion that in ametropic amblyopia, similarly as in stimulus deprivation amblyopia, changes of VEP develop that reflect the deterioration of contrast sensitivity function in low spatial frequencies. The developed VEP method with the modifications described in this paper may be useful in the diagnosis and objective evaluation of the degree of amblyopia.