Anatomy

Iris

The most anterior portion of the uveal layer, separating the anterior chamber from the posterior. It consists of two layers - the stroma and the pigmented epithelium. Color of the iris depends on the amount of melanin in the stroma on reflection from the pigmented epithelium.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The most anterior portion of the uveal layer, separating the anterior chamber from the posterior. It consists of two layers - the stroma and the pigmented epithelium. Color of the iris depends on the amount of melanin in the stroma on reflection from the pigmented epithelium.

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Aspects Covered

24 allowable subheadings

Indexed with the subheadings abnormalities, anatomy & histology, blood supply, chemistry, cytology, diagnostic imaging, drug effects, embryology, enzymology, growth & development, immunology, injuries, innervation, metabolism, microbiology, parasitology, pathology, physiology, physiopathology, radiation effects, surgery, transplantation, ultrastructure, virology.

MeSH Record

Indexing Annotation

inflammation = IRITIS but note IRIDOCYCLITIS is also available; color = EYE COLOR; /blood supply consider also CILIARY ARTERIES; pigmented epithelium of iris: coord IRIS with PIGMENT EPITHELIUM OF EYE

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References

  1. National Library of Medicine. Iris. Medical Subject Headings (MeSH). 2026. Unique ID D007498. http://id.nlm.nih.gov/mesh/2026/D007498
  2. Iris. In: Wikipedia. https://en.wikipedia.org/wiki/Iris_(anatomy)
  3. Iris. In: Wikidata. https://www.wikidata.org/wiki/Q178748