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The predictability of infant visual-evoked response testing on future visual acuity
R J Derick1, L E Leguire, G L Rogers
1Department of Ophthalmology, Ohio State University, Columbus.
Insights
Pattern-reversal visual-evoked response (VER) P1 latency accurately predicts later visual acuity and fixation in infants. This sensitive measure is crucial for assessing visual function in infants with abnormal eye exams.
Area of Science:
- Ophthalmology
- Neuroscience
- Pediatrics
Background:
- Infants with abnormal eye exams require reliable methods to predict future visual function.
- Visual-evoked response (VER) testing is a key diagnostic tool in pediatric ophthalmology.
- Previous studies have explored the utility of various VER parameters.
Purpose of the Study:
- To evaluate the predictive power of different visual-evoked response (VER) parameters for long-term visual function in infants.
- To determine which VER factors are most sensitive and reliable for assessing visual impairment in infants.
Main Methods:
- Retrospective review of 27 infants with abnormal eye examinations and VER testing.
- Long-term ophthalmology follow-up including visual acuity and fixation behavior assessment.
- Analysis of pattern-reversal and flash VER P1 latency and amplitude.
Main Results:
- Pattern-reversal VER P1 latency significantly predicted visual acuity (87%) and fixation behavior (86%) (P < .001).
- Flash VER P1 latency showed some predictive ability (73%) but was not statistically significant.
- Pattern VER P1 amplitude and flash VER P1 amplitude did not predict later visual function.
Conclusions:
- Pattern-reversal VER P1 latency is a highly predictive and sensitive measure of visual function in infants with abnormal eye exams.
- Its low variability and reflection of macular function contribute to its predictive power.
- Pattern VER P1 latency may be a valuable tool for early detection and management of visual impairment in infants.
Abstract:
We reviewed the records of 27 infants with abnormal eye examinations and visual-evoked response (VER) testing (mean age, 10.5 months) who subsequently underwent a long-term follow-up ophthalmology examination (mean duration, 41 months). The infants were initially diagnosed with various ocular disorders including cortical blindness (eight), optic nerve hypoplasia (six), congenital cataract (two), and retinopathy of prematurity (one). Standard optotype visual-acuity determinations were available in the follow-up records of 11 children (21 eyes), and fixation behavior was obtained in the remaining 16 children (32 eyes). Results revealed that pattern-reversal VER P1 latency was predictive (87%) of whether visual acuity was equal to (or better than) or worse than 20/100 and whether a patient would have good fixation behavior (fix and follow, FF) or poor fixation (no FF) (86%) (P less than .001). Although flash VER P1 latency was also predictive of later visual acuity or good fixation (73%), it was not statistically significant. Pattern VER P1 amplitude and flash VER P1 amplitude were not predictive of later visual function. The predictive power of pattern VER P1 latency for later visual function probably relates to its reflection of macular function and low variability. An analysis of the variability of each of the four VER factors in normal infants (n = 50) indicated that pattern VER P1 latency was the least variable, and consequently most sensitive, VER factor for detecting and quantifying pathology. Overall, the results of this retrospective study suggest that pattern VER P1 latency may have important predictive power for later visual function in infants with an initially abnormal ophthalmologic examination.