Journal of Ophthalmic and Optometric Sciences

Purpose: The aim of this study was to compare the Visual Evoked Potential (VEP) findings in patients with dyslexia and in normal individuals.
Patients and Methods: In this case-control study, we evaluated 26 eyes from 13 dyslexic patients over the period of 2018-2022. The control group consisted of 26 eyes from 13 age- and sex-matched healthy individuals. VEP was recorded for both the case and control groups. We compared the latency (in milliseconds) and amplitude of the VEP P100 peak between the patients and the controls.
Results: The mean latency of the VEP P100 peak was significantly higher in the patient group, measuring 108.92 ± 3.84 milliseconds, compared to 97.46 ± 2.8 milliseconds in the control group (P < 0.01). Additionally, the mean amplitude of the VEP, P100 peak in the case group was significantly lower, at 2.96 ± 1.12 microvolts, in contrast to 6.38 ± 1.6 microvolts observed in the control group (P < 0.01).
Conclusion: Based on the findings of this study, it is concluded that dyslexia may influence the visual pathway of the visual system, leading to changes that could potentially be evaluated using VEP testing.