"Iris" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.
MeSH information
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.

This graph shows the total number of publications written about "Iris" by people in this website by year, and whether "Iris" was a major or minor topic of these publications.
Bar chart showing 1082 publications over 30 distinct years, with a maximum of 82 publications in 2018
To see the data from this visualization as text, click here.