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Related Experiment Videos

Iris crystals in chronic uveitis.

A B Callear1, A Reynolds, J Harry

  • 1Academic Unit of Ophthalmology, Birmingham and Midland Eye Centre, Birmingham.

The British Journal of Ophthalmology
|May 26, 1999
PubMed
Summary
This summary is machine-generated.

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Iris crystals, though rare in uveitis patients, may be underreported. These small deposits are likely linked to active immunoglobulin production in the anterior chamber, particularly in Fuchs

Area of Science:

  • Ophthalmology
  • Immunology

Background:

  • Iris crystals are an unusual physical sign observed in patients with uveitis.
  • Their occurrence and association with specific uveitis entities require further investigation.

Purpose of the Study:

  • To analyze the characteristics of iris crystals in patients diagnosed with uveitis.
  • To explore potential correlations between iris crystals and clinical features, immunoglobulin levels, and histopathological findings.

Main Methods:

  • Demographic and clinical data were collected from 24 patients with chronic uveitis and iris crystals.
  • Plasma immunoglobulin subclasses were measured, and histopathological analysis of iridectomy specimens from 33 uveitis patients was performed.

Main Results:

Related Experiment Videos

  • The study included 24 patients with a mean age of 38 years, predominantly female.
  • Iris crystals were most frequently observed in Fuchs' heterochromic cyclitis, but no correlation was found between crystal presence and clinical severity.
  • No significant changes in crystals were noted over 15 months, except post-surgery. Only three patients had elevated IgG1, and no Russell bodies were found histologically.

    • Conclusions:

    • Iris crystals are rare but potentially underreported due to their small size.
    • Their presence suggests an association with intraocular immunoglobulin production, common in conditions like Fuchs' heterochromic cyclitis.