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September 5, 2026The Egyptian Journal of Neurology Psychiatry and NeurosurgeryOpen Access

Electrophysiology of vision after smartphone use

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Authors

LMLeqaa Ali El MekkawyAHAyat Allah Farouk HusseinEMEman Maher

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Overview

Interventional study reveals acute retinal and visual pathway electrophysiological delays in healthy adults after smartphone exposure, indicating temporary central retinal functional impairment.

Key Points

  • To evaluate the acute effects of smartphone use on visual electrophysiology using visual evoked potentials (VEP) and electroretinography (ERG) in healthy adults, correlating findings with age and previous usage duration.
  • Assessed 70 healthy adult participants before and after a 1-hour continuous smartphone exposure session conducted at a fixed viewing distance of 30 cm.
  • Recorded electrophysiological parameters including pattern visual evoked potentials (P-VEP), pattern ERG (P-ERG), full-field flash ERG (F-ERG), and multifocal ERG (MF-ERG).
  • Correlated electrophysiological changes with participant age and individual history of mobile phone usage duration.
  • P-VEP demonstrated a statistically significant delay in P100 latency, showing a positive correlation with age and a negative correlation with previous usage duration, while P-ERG parameters remained unchanged.
  • F-ERG revealed a statistically significant reduction in b-wave amplitude, alongside a significant negative change in a-wave latency relative to age.
  • MF-ERG showed statistically significant P1 amplitude reductions and latency delays, with P1 wave changes negatively correlating with both participant age and prior smartphone usage duration.

Cite This Study

Mekkawy et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd4436b95aff0620ebce0https://doi.org/10.1186/s41983-026-01226-w
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Study of Effect of Chronic Use of Mobile Phones on Visual Evoked Potential in the Young-Adult Population2026
  2. 2Comparison of visual-evoked potential parameters and prevalence of eye strain symptoms among electronic device users with varying screen time2026
  3. 3Digital Eye Strain Monitoring for One-Hour Smartphone Engagement Through Eye Activity Measurement System2025 · 4 citations
  4. 4Effect of Smart Phone on Accommodation and Vergence Response in Bright and Dark Illumination with Different Positions2024 · 1 citations
  5. 5Analysis of the effect of high-frequency electromagnetic radiation on electroencephalography wave frequencies2026