[Comparison of Pattern-pulse and Pattern-reversal Multifocal Visual Evoked Potentials in Normal Individuals]

Area of Science:

• Ophthalmology
• Neuroscience
• Visual Electrophysiology

Background:

• Multifocal visual evoked potential (mfVEP) is crucial for assessing retinal function.
• Comparing pattern-pulse (PPmfVEP) and pattern-reversal (PRmfVEP) mfVEP is important for understanding their diagnostic utility.
• Assessing interocular symmetry of mfVEP provides insights into visual system consistency.

Purpose of the Study:

• To compare the efficacy of PPmfVEP and PRmfVEP in assessing visual function.
• To investigate the symmetry of mfVEP responses between the two eyes in healthy individuals.

Main Methods:

• Utilized the multifocal Vision Monitor to record mfVEP.
• Employed t-tests and ANOVA for statistical analysis of P1 wave, amplitude, and signal-to-noise ratios (SNR).

Main Results:

• Both SNR and P1 amplitude peaked in the central visual field, decreasing with eccentricity.
• PPmfVEP amplitude was smaller than PRmfVEP in the central retina but larger in the periphery.
• PRmfVEP showed no significant interocular differences in SNR or amplitude; mfVEP demonstrated symmetry between eyes.

Conclusions:

• mfVEP objectively quantifies visual function across retinal regions.
• PPmfVEP offers superior assessment of central retinal function compared to PRmfVEP.
• mfVEP responses are symmetrical between the eyes in normal individuals.