Retinoscopy and visual evoked potential based evaluation of the exactness of hyperopia correction in children with developmental difficulties.

The aim of this study was to evaluate the possibility of evaluation of optimal hyperopic correction based on visual evoked potential (VEP) examination results in children that do not cooperate. There are relatively few studies that evaluated the correlation between visual acuity and especially in young hyperopes. We examined 80 children (160 eyes) with hyperopia, divided into two groups: children that were cooperative during examination and children that could not cooperate with the examiner. Upon determination of the eye refractive state by other objective methods, the prescribed refraction was checked by following the change in VEP P100 wave amplitude and prescribed the correction for which these values were highest. The first VEP curve was recorded without any correction, then more VEP curves were recorded after increasing correction between +1.0 and +6.0 D, in the range found by retinoscopy, with 1 D step. The correction values that caused VEP curves with highest amplitude and shortest P100 wave latency were recorded. In conclusion, the VEP curve parameters were confirmed to depend on the refractive state of the eye.