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“iris”
iris
The circular, colored curtain of the eye. Its opening forms the pupil. The iris helps regulate the amount of light that enters the eye.
The eye has a number of other key components including: the cornea, the pupil, the lens, the retina, the macula, the optic nerve, and the vitreous.
- The cornea is the clear front window of the eye that transmits and focuses light into the eye.
- The pupil is the dark aperture in the iris that determines how much light is let into the eye.
- The lens is the transparent structure inside the eye that focuses light rays onto the retina.
- The retina is the nerve layer that lines the back of the eye, senses light and creates impulses that travel through the optic nerve to the brain.
- The macula is a small area in the retina that contains special light-sensitive cells and allows us to see fine details clearly.
- The optic nerve is the nerve that connects the eye to the brain and carries the impulses formed by the retina to the visual cortex of the brain.
- The vitreous humor is a clear, jelly-like substance that fills the middle of the eye.
This entry is located in the following unit:
irido-, irid-, iri-, iris- +
(page 3)
Rainbow: Iris
Greek: Iris (goddess)
Latin: (no equivalent goddess)
Latin: (no equivalent goddess)
This entry is located in the following unit:
gods and goddesses from Greek and Latin Myths
(page 2)
Units related to:
“iris”
(Modern Latin: chemical element; from Greek, iris, a "rainbow", because of the changing color of its salts; metal)
(Greek: iris [relating to the eye]; the rainbow; colored circle, colored portion of the eye [originally, "something bent or curved"])
(Latin: grapelike; the uvea, the [grapelike] surface of the iris of the eye)
Word Entries containing the term:
“iris”
anulus iridis, border of iris, ring of iris
Either of two zones on the anterior surface of the iris, separated by a circular line concentric with the pupillary border.
This entry is located in the following units:
annul-, anul-
(page 1)
-ulus, -olus, -ulum, -ola
(page 1)
iris dehiscence
A defect of the eye characterised by multiple holes in the iris.
This entry is located in the following unit:
hiat-; -hisc-
(page 1)
prolapse of the iris (noun)
The protrusion of the iris through an injury in the cornea of the eye.
This entry is located in the following unit:
laps-, lab-
(page 2)