What is the medical definition of uveal?
medical Definition of uveal. : of, relating to, affecting, or being the uvea. uveal tissue.
What is the uvea of the eye?
The uvea ( /ˈjuːviə/; Lat. uva, "grape"), also called the uveal layer, uveal coat, uveal tract, vascular tunic or vascular layer is the pigmented middle of the three concentric layers that make up an eye. The name is possibly a reference to its reddish-blue or almost black colour, wrinkled appearance and grape-like size...
What is the uvea made of?
Relating to the uvea. The highly vascular middle layer of the eyeball, immediately beneath the sclera. It consists of the iris, ciliary body, and choroid, and forms the pigmented layer.
What is uveitis?
Recent Examples on the Web Uveitis is an inflammation of the layer that lies beneath the outer surface of the eye (called the uvea). — Harvard Health Letter, chicagotribune.com, 7 Nov. 2019 Unsurprisingly, uveitis usually affects a part of your eye called the uvea, which is the middle layer that has a lot of blood vessels.
What does the word uveal mean?
(yo͞o′vē-ə) n. The vascular middle layer of the eye constituting the iris, ciliary body, and choroid. [Medieval Latin ūvea, from Latin ūva, grape.]
Is uveal a word?
UVEAL is a valid scrabble word.
Which part of the eye is uveal?
The uveal tract has 3 main parts: (1) the choroid (the tissue layer filled with blood vessels); (2) the ciliary body (the ring of tissue that contains muscles that change the shape of the lens and makes the clear fluid that fills the space between the cornea and the iris; and (3) the iris (the colored part of the eye).
Why is it called the uvea?
The middle coat of the eye is called the uvea (from the Latin for “grape”) because the eye looks like a reddish-blue grape when the outer coat has been dissected away.
What is uvea eye?
The uvea is the middle layer of tissue in the wall of the eye. It consists of the iris, the ciliary body and the choroid. When you look at your eye in the mirror, you will see the white part of the eye (sclera) and the colored part of the eye (iris).
What is the plural of uvea?
The uvea (plural: uveas), also called the uveal layer or vascular tunic is the middle of the three layers that make up the eye.
What is the function of uveal tract?
It is the source of blood flow to the ocular tissues. It is the source of aqueous humour (fluid that fills the inside of the eye) and maintenance of intraocular pressure. It constitutes the blood-aqueous barrier and prevents undesired blood products from reaching the eye.
What is the white part of your eye called?
The white layer of the eye that covers most of the outside of the eyeball. Anatomy of the eye, showing the outside and inside of the eye including the eyelid, pupil, sclera, iris, cornea, lens, ciliary body, retina, choroid, vitreous humor, and optic nerve.
What is uvea made of?
The uvea is the middle layer of the eye. It lies beneath the white part of the eye (the sclera). It is made of the iris, ciliary body, and choroid. These structures control many eye functions, including adjusting to different levels of light or distances of objects.
How thick is a human iris?
Iris thickness was measured at 750 μm (IT750) and 2000 μm (IT2000) from the scleral spur, as well as cumulative iris area (IAREA). Pupil diameter in millimeters (PDMM) was measured between the most central points of the iris at the nasal and temporal sides.
What is difference between uvea and choroid?
The uvea or vascular tunic of the eye consists of the choroid, ciliary body, and iris. The choroid lies between the sclera and RPE, and contains connective tissue, capillaries, and melanocytes. The choroid terminates anteriorly as the ciliary body.
What does Thrasonical mean?
bragging, boastfulDefinition of thrasonical : of, relating to, resembling, or characteristic of Thraso : bragging, boastful.
What is meant by candelabrum?
Definition of candelabra : a branched candlestick or lamp with several lights.
What are the functions of the uveal region?
In addition, some uveal regions have special functions of great importance, including secretion of the aqueous humour by the ciliary processes, control of accommodation (focus) by the ciliary body, and optimisation of retinal illumination by the iris's control over the pupil.
What is the UVEA prone to?
The normal uvea consists of immune competent cells, particularly lymphocytes, and is prone to respond to inflammation by developing lymphocytic infiltrates. A rare disease called sympathetic ophthalmia may represent 'cross-reaction' between the uveal and retinal antigens (i.e., the body's inability to distinguish between them, with resulting misdirected inflammatory reactions).
What are the constituents of the UVEA?
The constituents of the uvea follow: iris labeled at top, ciliary body labeled at upper right, and choroid labeled at center right. ) The uvea ( / ˈjuːviə /; Lat. uva, "grape"), also called the uveal layer, uveal coat, uveal tract, vascular tunic or vascular layer is the pigmented middle of the three concentric layers that make up an eye.
What is the vascular layer of the eye called?
The uvea ( / ˈjuːviə /; Lat. uva, "grape"), also called the uveal layer, uveal coat, uveal tract, vascular tunic or vascular layer is the pigmented middle of the three concentric layers that make up an eye.
How does the UVEA improve the contrast of the retina?
Light absorption: the uvea improves the contrast of the retinal image by reducing reflected light within the eye (analogous to the black paint inside a camera), and also absorbs outside light transmitted through the sclera, which is not fully opaque.
What is the vascular middle layer of the eye?
The uvea is the vascular middle layer of the eye. It is traditionally divided into three areas, from front to back, the:
