Zonular fibers

Information about Zonular fibers

Zonular fibers
Schematic diagram of the human eye.
The upper half of a sagittal section through the front of the eyeball.
Latinfibrae zonulares
subject #226 1018
Dorlands/Elsevier f_05/12362135
The zonular fibers are fibers which connect the lens to the rest of the eye. Collectively, they are known as the suspensory ligament of the lens.[1]

More specifically, the zonula ciliaris splits into two layers, one of which is thin and lines the hyaloid fossa; the other is named the suspensory ligament of the lens.

It is thicker, and passes over the ciliary body to be attached to the capsule of the lens a short distance in front of its equator.

See also

References

1. ^ [1]

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

 •  • [ e]
Sensory system - Visual system - Eye
Fibrous tunic (outer)Conjunctiva • Sclera  • Schlemm's canal • Trabecular meshwork • Limbus
Cornea (Epithelium, Bowman's, Stroma, Descemet's, Endothelium)
Uvea (middle)Choroid (Ciliary processes, Choriocapillaris, Bruch's membrane) • Iris (Stroma)  • Pupil • Ciliary body
Retina (inner)Macula • Fovea • Optic disc
Anterior segmentAnterior chamber • Aqueous humour • Posterior chamber • Lens
Posterior segmentVitreous humour • Zonular fibers • Zonule of Zinn
In sciences dealing with the anatomy of animals, precise anatomical terms of location are necessary for a variety of reasons. Non-scientists often wonder why zoological and human anatomists use complex terminology to describe locations on a body, when common terms like "up",
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Eyes are organs of vision that detect light. Different kinds of light-sensitive organs are found in a variety of organisms. The simplest eyes do nothing but detect whether the surroundings are light or dark, while more complex eyes can distinguish shapes and colors.
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Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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The lens is a transparent, biconvex (lentil-shaped) structure in the eye that, along with the cornea, helps to refract light to be focused on the retina. Its function is thus similar to a human-made optical lens.
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The zonule of Zinn (Zinn's membrane, ciliary zonule) is a ring of fibrous strands connecting the ciliary body with the crystalline lens of the eye. The zonular fibers hold the lens in place and function to change the focusing power of the eye by changing the tension
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The ciliary body is the circumferential tissue inside the eye composed of the ciliary muscle and ciliary processes.[1] It is part of the uveal tract—the layer of tissue which provides most of the nutrients in the eye.
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The lens is a transparent, biconvex (lentil-shaped) structure in the eye that, along with the cornea, helps to refract light to be focused on the retina. Its function is thus similar to a human-made optical lens.
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Suspensory ligament describes any ligament that supports a body part, especially an organ. Types include:
  • In humans
  • Suspensory ligament of the penis

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Boston University (BU) is a private research university located in Boston, Massachusetts, United States. Although chartered by the Massachusetts Legislature in 1869, Boston University traces its roots to the establishment of the Newbury Biblical Institute in Newbury,
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Public domain comprises the body of knowledge and innovation (especially creative works such as writing, art, music, and inventions) in relation to which no person or other legal entity can establish or maintain proprietary interests within a particular legal jurisdiction.
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Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened) is an English-language human anatomy textbook widely regarded as a classic work on the subject.
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sensory system: in this case, vision, for the visual system. ]]

A sensory system is a part of the nervous system responsible for processing sensory information.
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The visual system is the part of the nervous system which allows organisms to see. It interprets the information from visible light to build a representation of the world surrounding the body.
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Eyes are organs of vision that detect light. Different kinds of light-sensitive organs are found in a variety of organisms. The simplest eyes do nothing but detect whether the surroundings are light or dark, while more complex eyes can distinguish shapes and colors.
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The sclera and cornea form the fibrous tunic of the bulb of the eye; the sclera is opaque, and constitutes the posterior five-sixths of the tunic; the cornea is transparent, and forms the anterior sixth.
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The conjunctiva is a membrane that covers the sclera (white part of the eye) and lines the inside of the eyelids.

Function

It helps lubricate the eye by producing mucus and tears, although a smaller volume of tears than the lacrimal gland.
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The sclera is the opaque (usually white), fibrous, protective layer of the eye containing collagen and elastic fibers.[1] In children, it is thinner and shows some of the underlying pigment, appearing slightly blue.
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Schlemm's canal, also known as canal of Schlemm or the scleral venous sinus, is a circular channel in the eye that collects aqueous humor from the anterior chamber and delivers it into the bloodstream.
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The trabecular meshwork is an area of tissue in the eye located around the base of the cornea, near the ciliary body, and is responsible for draining the aqueous humor from the eye via the anterior chamber (the chamber on the front of the eye covered by the cornea).
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The corneal limbus is the border of the cornea and the sclera. It is the attachment of several extraocular muscles.

External links

  • Atlas of anatomy at UMich eye_1 - "Sagittal Section Through the Eyeball"
  • http://www.vetmed.ucdavis.

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The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber, providing most of an eye's optical power.[1] Together with the lens, the cornea refracts light, and as a result helps the eye to focus, accounting for approximately
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The corneal epithelium (epithelium corneæ anterior layer) covers the front of the cornea and consists of several layers of cells.

The cells of the deepest layer are columnar; then follow two or three layers of polyhedral cells, the majority of which are
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The Bowman's membrane (Bowman's layer, anterior limiting lamina, anterior elastic lamina) is a smooth layer in the eye. It is located between the front epithelium and the stroma in the cornea.
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The substantia propria (or stroma of cornea) is fibrous, tough, unyielding, and perfectly transparent.

It is composed of about 200 flattened lamellæ (plates of collagen fibrils), superimposed one on another.
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Descemet's membrane is the basement membrane that lies between the corneal proper substance, also called stroma, and the endothelial layer of the cornea. The endothelial layer is located at the posterior of the cornea.
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For the lining of blood vessels, see endothelium


The corneal endothelium is a monolayer of specialized, flattened, mitochondria-rich cells that lines the posterior surface of the cornea and faces the anterior chamber of the eye.
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For the Pacific island, see Wallis Island.
The uvea (Lat. uva, grape), also called the uveal layer, uveal coat, uveal tract, or vascular tunic
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The choroid, also known as the choroidea or choroid coat, is the vascular layer of the eye lying between the retina and the sclera, with a thickness about 0.5 mm. The choroid provides oxygen and nourishment to the outer layers of the retina [1] .
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The ciliary processes are formed by the inward folding of the various layers of the choroid, i.e., the choroid proper and the lamina basalis, and are received between corresponding foldings of the suspensory ligament of the lens.
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