Optimizing cyclopean stimuli for the evaluation of stereo vision by steady-state visual evoked potentials
Year: 2025
Type: article
Abstract: Purpose This study aimed to optimize dynamic random dot correlogram (DRDC) and stereogram (DRDS) stimuli to evoke steady-state visual evoked potentials (ssVEP) on multiple EEG channels for the objective assessment of stereopsis. Methods EEG recordings were conducted on 22 healthy adults (mean age: 30.2 ± 5.8 years) while viewing cyclopean and control stimuli. DRDC and DRDS were presented at three temporal frequencies (0.9375, 1.875, and 3.75 cycles per second, cps) using anaglyphic channel separation. The ssVEP responses were analyzed using T 2 circ statistical test to determine the most effective stimulus for eliciting significant cortical activity. Results DRDC at 1.875 cps evoked significant ssVEP responses in 93% of participants on at least one occipital electrode (O1, Oz, O2) and in 100% when including parietal-occipital electrodes. DRDS at similar frequencies also produced robust responses but required additional parietal electrode monitoring. Monocular control measurements confirmed that responses were stereo-specific. Conclusions DRDC at 1.875 cps was the most effective stimulus for objective electrophysiological assessment of stereopsis, demonstrating high reliability with minimal electrode setups. These findings support the integration of optimized ssVEP protocols into clinical assessments, particularly for non-verbal or pediatric populations.
Source: Documenta Ophthalmologica
Authors: János Radó, Eszter Mikó–Baráth, Péter Hegyi, Vanda A. Nemes, Gábor Jandó, Péter Buzás
Institution: University of Pecs
Language: English
Subfield: Cognitive Neuroscience
Field: Neuroscience
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $4,090
Funder: Pécsi Tudományegyetem
OpenAlex ID: W4415281150