Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

Iris (anatomy)

The iris (pl.: irides or irises) is a thin, ring-shaped structure in the eye in most mammals and birds that is responsible for controlling the diameter and size of the pupil, and thus the amount of light reaching the retina. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm. Eye color is defined by the iris.

Regions, Eye color & Structure

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around Iris (anatomy). Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Artery
Long posterior ciliary arteries
FMA
58235
Latin
iris
MeSH
D007498
Nerve
Long ciliary nerves, short ciliary nerves
Part of
Front of eye

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Etymology

Structure

Function

Eye color

Clinical significance

Alternative medicine

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Iris (anatomy)

Nodes79
Edges78
Triples10
Avg. degree1.97
Density0.025316
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Iris (anatomy)

Top relations

Artery · 1
Iris (anatomy) → Long posterior ciliary arteries
FMA · 1
Iris (anatomy) → 58235
Latin · 1
Iris (anatomy) → iris
MeSH · 1
Iris (anatomy) → D007498
Nerve · 1
Iris (anatomy) → Long ciliary nerves, short ciliary nerves
Part of · 1
Iris (anatomy) → Front of eye
Precursor · 1
Iris (anatomy) → Mesoderm and neural ectoderm
System · 1
Iris (anatomy) → Visual system
TA2 · 1
Iris (anatomy) → 6753
TA98 · 1
Iris (anatomy) → A15.2.03.020

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

iris color pupil eye pigment also ciliary stroma front border melanin heterochromia blue sclera muscle pupillary irises size colors humans

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Iris (anatomy)ArteryLong posterior ciliary arteries1.00infobox
Iris (anatomy)FMA582351.00infobox
Iris (anatomy)Latiniris1.00infobox
Iris (anatomy)MeSHD0074981.00infobox
Iris (anatomy)NerveLong ciliary nerves, short ciliary nerves1.00infobox
Iris (anatomy)Part ofFront of eye1.00infobox
Iris (anatomy)PrecursorMesoderm and neural ectoderm1.00infobox
Iris (anatomy)SystemVisual system1.00infobox
Iris (anatomy)TA267531.00infobox
Iris (anatomy)TA98A15.2.03.0201.00infobox

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.