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Related Experiment Videos

Ocular abnormalities in Alagille syndrome

M Hingorani1, K K Nischal, A Davies

  • 1Department of Ophthalmology, King's College Hospital, London, England.

Ophthalmology
|February 10, 1999
PubMed
Summary

Alagille syndrome (AS) commonly causes ocular abnormalities like posterior embryotoxon and optic disc anomalies, but these typically do not affect vision. Early diagnosis of AS is possible through simple eye exams in children and parents.

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Area of Science:

  • Ophthalmology
  • Genetics
  • Pediatrics

Background:

  • Alagille syndrome (AS) is a genetic disorder affecting multiple organs, including the eyes.
  • Ocular manifestations in AS are common but not fully characterized.
  • The role of nutritional deficiencies in AS-related eye conditions requires investigation.

Purpose of the Study:

  • To determine the frequency and types of ocular abnormalities in Alagille syndrome patients and their parents.
  • To explore the potential link between fat-soluble vitamin deficiency and ocular findings in AS.
  • To assess the clinical significance of these ocular abnormalities.

Main Methods:

  • An observational case series involving 22 children with AS and 23 parents.
  • Comprehensive ophthalmic examinations including refraction, slit-lamp, and funduscopy.

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  • Serum vitamin A, E, and cholesterol levels were measured.

    • Main Results:

    • Posterior embryotoxon (95%), optic disc anomalies (76%), and fundus hypopigmentation (57%) were most common in AS patients.
    • Iris abnormalities (45%) and retinal pigment epithelium speckling (33%) were also observed.
    • Ocular findings were present in 36% of parents; vitamin levels were normal, suggesting no link to deficiency.

    Conclusions:

    • Alagille syndrome presents with characteristic ocular findings, generally without significant visual impairment.
    • These ocular abnormalities are likely unrelated to fat-soluble vitamin deficiency.
    • Ophthalmic screening of children with neonatal cholestatic jaundice and their families can aid early AS diagnosis.