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Sporadic aniridia and Wilms' tumor: visual function evaluation of three cases
C Harnois1, H M Boisjoly, V Jotterand
1Unité de Recherche en Ophthalmologie, Centre Hospitalier de l'Université Laval, Québec, Canada.
Summary
Infants with sporadic aniridia, Wilms
Area of Science:
- Ophthalmology
- Genetics
- Pediatrics
Background:
- Aniridia is a rare genetic disorder affecting eye development.
- Sporadic aniridia is often associated with Wilms' tumor and chromosome 11p deletion.
- Visual function in affected infants requires detailed evaluation.
Purpose of the Study:
- To assess the visual function of infants with sporadic aniridia, Wilms' tumor, and chromosome 11p deletion.
- To correlate electrophysiological findings with clinical presentation.
- To evaluate potential interventions for improving visual comfort.
Main Methods:
- Electrophysiological tests including electroretinograms (ERGs) and flash visual evoked potentials (FVEPs).
- Clinical assessment of symptoms like nystagmus and photophobia.
- Evaluation of the impact of artificial pupil contact lenses.
Main Results:
- Normal ERGs in sporadic aniridia cases, differing from familial cases.
- Prolonged FVEP latency indicating delayed nervous system maturation.
- No evidence of retinal anomalies or optic nerve hypoplasia.
- Reduced photophobia and nystagmus with artificial pupil contact lenses.
Conclusions:
- Poor visual function in these infants is likely due to delayed nervous system maturation, not primary retinal issues.
- Artificial pupil contact lenses can significantly improve patient comfort by reducing photophobia and nystagmus.
- Early electrophysiological assessment is crucial for understanding visual deficits in this condition.