Related Experiment Video
Updated: Oct 11, 2025
Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
Published on: May 12, 2019
Prognostic value of transient pattern visual evoked potentials in children with cerebral visual impairment
Jessica Howes1, Dorothy Thompson2, Alki Liasis3
1University College London Medical School, London, UK.
Insights
Pattern reversal visual evoked potentials (PRVEPs) in infants with cerebral visual impairment (CVI) can predict future visual acuity. Early PRVEP results offer valuable prognostic information for visual development in CVI patients.
Area of Science:
- Ophthalmology
- Neuroscience
- Pediatrics
Background:
- Cerebral visual impairment (CVI) is a leading cause of visual deficit in children.
- Predicting long-term visual outcomes in infants with CVI is crucial for early intervention.
- Visual evoked potentials (VEPs) are non-invasive electrophysiological tests assessing visual pathway function.
Purpose of the Study:
- To determine if pattern reversal visual evoked potentials (PRVEPs) can predict future visual acuity in infants diagnosed with CVI.
- To evaluate the prognostic value of early VEP measurements for visual development in children with CVI.
Main Methods:
- Retrospective analysis of 55 children with severe CVI.
- Comparison of visual evoked potentials (VEPs) and behavioral visual acuity at presentation (T1) with final visual acuity (T2).
- Logistic and linear regression analyses were used to identify predictors of visual acuity at T2.
Main Results:
- The presence of a PRVEP with check widths of 50' or smaller at T1 predicted measurable preferential looking acuity at T2 (p=0.05).
- PRVEPs to check widths of 25' or smaller at T1 predicted better preferential looking acuity scores at T2 (p=0.02), independent of initial acuity.
- These associations remained significant even when controlling for initial visual acuity.
Conclusions:
- Infantile PRVEPs, particularly to finer check stimuli (50' and 25'), provide significant prognostic information for visual acuity in children with CVI.
- VEPs in early childhood hold prognostic value for predicting future visual acuity in the context of CVI.
Aim:
To investigate whether pattern reversal visual evoked potentials (PRVEPs) could predict future visual acuity in infants with cerebral visual impairment (CVI).
Method:
Fifty-five children (27 males, 28 females) with severe CVI seen in the ophthalmology department of a specialist children's hospital were identified retrospectively. Behavioural visual acuity and visual evoked potentials (VEPs) at presentation (time 1, T1) were compared with final visual acuity at late preschool/early school age (time 2, T2). Predictors of visual acuity at T2 were identified using univariate and multivariate logistic and linear regression analysis.
Results:
Median age was 14 months at T1 (range: 6-44mo) and 63 months at T2 (range: 29-150mo). The presence of a PRVEP produced by a check width of 50' (minutes of arc) or smaller (T1) predicted (p=0.05) the presence of measurable preferential looking acuity at T2. The presence of PRVEP to check widths of 25' or smaller (T1) predicted (p=0.02) better preferential looking acuity (logMAR-equivalent) scores at T2. The latter association was independent of presenting acuity at T1.
Interpretation:
The presence of PRVEPs to check widths of 50' and 25' in infancy provided useful information. VEPs in young children with CVI may have prognostic value regarding future acuity.
