The bulbar conjunctiva bulbar portion upon the sclera, the conjunctiva is loosely connected to the bulb of the eye. Zieske the cornea, conjunctiva, and intervening transition area known as the limbus comprise the tissues at the ocular surface. When it is scarred or infected, it may appear white in some areas. Is the conjunctiva normally lined by keratin in the outer layers. In bright light, the pupil closes to decrease the amount of light entering the eye. It has no blood vessels in it, and normally is completely transparent. Pdf micropulse transscleral cyclophotocoagulation mptcp is increasingly. Perhaps the most appropriate tissue for such a task is the thin mucous membrane that covers the sclera of the human eye, the conjunctiva. There are subtle histologic differences in the conjunctiva of the lid margins, tarsus, fornix, and bulbar conjunctivae.
Based on the anatomy what types of cancers would you expect to be found in the conjunctiva. In the photo below identify the various topographical areas of conjunctiva. Small muscles attached to the lens cause it to bend. In the average adult, the horizontal diameter of the cornea is 11. Ibrite works by removing the conjunctiva membrane, which then regrows after the procedure.
Meanwhile, the forniceal conjunctiva creates a fold where the eyelid meets the eyeball at the medial canthus. Conjunctiva palpebral conjunctiva marginal tarsal orbital bulbar. Anatomy and physiology of the conjunctiva presented by arundhati hatikakoty bachelor of optometry 3rd year roll no 302 2. This contribution explores both the form and function of numerous anatomic features of the human ocular system, which are vital to a comprehensive understanding of the pathophysiology of many oculocutaneous diseases. This resource includes descriptions, functions, and problems of the major structures of the human eye. Anatomy, physiology, symptomatology and classification dr. A membrane that lines the inner surface of the eyelid and also covers the front part of the eye. Read an overview of general eye anatomy to learn how the parts of the eye work together. For ophthalmologists, optometrists, medical, dental, and optometry students, eyeanatomy forms the basis for eyepathology in diseases.
The limbus 1 is the junction of the conjunctiva and cornea. In that case the contacts should be refitted, or perhaps discontinued. Cicatrizing conditions can create a foreshortened fornix, thereby decreasing the area of measurable bulbar conjunctiva. Anatomy of the ocular surfaces, cornea, and conjunctiva, rat. Measurements of conjunctiva blood flow in human eyes have been reported using a modified scanning laser ophthalmoscope duench, et al. The stratified squamous epithelium that makes up the conjunctiva varies greatly in density in. The conjunctiva is a thin membrane that covers the inner surface of the eyelid and the white part of the eyeball the sclera. Substantia propria is more uniform than in bulbar conjunctiva and is more closely attached to tarsus so invasive lesions appear clinically flat, has arterioles, veins and complex capillary network, myelinated and nonmyelinated branches of trigeminal nerve, lymphoid aggregates near fornices, acini and ducts of accessory lacrimal glands of. Upon the cornea, the conjunctiva consists only of epithelium, constituting the epithelium of the cornea. The inflammation may be caused by a viral or bacterial infection.
This post includes an outline of parts of the eye, refractive errors, eye muscles, muscular errors, and medicalsurgical conditions. Anatomy of the ocular surfaces, cornea, and conjunctiva. Finally, the conjunctival fornices are divided into the superior, inferior, lateral, and. The eyes are protected by eyelids and suspended in the orbit by ocular muscles, which are also responsible for eye movements. Anatomy of the eye easy peasy allinone high school. The conjunctiva of the eye provides protection and lubrication of the eye by the production of mucus and tears. Tarsal conjunctiva is firmly adherent to the whole tarsal plate in the upper lid. Corneal pannus means the growth of fine blood vessels onto the clear corneal surface.
Nov 20, 2015 the conjunctiva is composed of three connected parts. Ppt eye anatomy powerpoint presentation free to download. Ocular fluids, conjunctival secretions and tears from patients with. The conjunctiva helps lubricate the eye by producing mucus and tears, although a smaller volume of tears than the lacrimal gland. A thin, clear, moist membrane that coats the inner surfaces of the eyelids palpebral conjunctiva and the outer surface of the eye ocular, or bulbar, conjunctiva. The eye and brain have several notable parallels that from a hemorheologic standpoint are distinctive in terms of human anatomy. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. All about the conjunctiva of the eye, including what to do about conjunctival pallor or injection. The inferior fornix is typically between 10 and 12 mm in normals and decreases with age. It prevents microbial entrance into the eye and plays a role in immune surveillance. Conjunctiva anatomy by dr bal kishore, cell biologist and neuro anatomist. Human eye anatomy parts of the eye and structure of the. The conjunctiva helps lubricate the eye by producing mucus and tears. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
What specialized cells are contained in the conjunctiva. Ocular anatomy looks complicated at first, but its pretty straightforward. Identify important anatomical landmarks of conjunctiva. It is at the front of the eye just in front of the coloured part of the eye, the iris. Oct 17, 2010 the regional variation of the conjunctiva start with an overview in a photograph in which the patient is looking up. A thin, mucous membrane, the conjunctiva serves to protect the front of the eyeball. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Conjunctiva is continuous anteriorly with the epithelium of the cornea. It is composed of unkeratinized, stratified squamous epithelium with goblet cells, and stratified columnar epithelium.
The anatomy of the eye includes auxillary structures, such as the bony eye socket and extraocular muscles, as well as the structures of the eye itself, such as the lens and the retina. The conjunctivais a clear mucous membrane that lines the inner surfaces of the eyelids and and continues on to cover the front surface of the eyeball, except for the central clear portion of the outer eye the cornea. The anatomy and cell biology of the human cornea, limbus. In contextanatomylangen terms the difference between sclera and conjunctiva is that sclera is anatomy the white of the eye it is the tough outer coat of the eye that covers the eyeball except for the cornea while conjunctiva is anatomy a clear mucous membrane that lines the inner surface of the eyelid and the exposed surface of the eyeball or sclera. The ocular conjunctiva is also called the bulbar conjunctiva. Anatomy and function of the conjunctiva ibrites wordpress. Although all parts of the conjunctiva are continuous each has been given its own name to emphasize anatomic differences. Anatomy, physiology, symptomatology and classification pranay shinde dnb resident deen dayal upadhyay hospital,new delhi 2. Webmds eyes anatomy pages provide a detailed picture and definition of the human eyes. Conjunctiva national library of medicine pubmed health. The stratified squamous epithelium that makes up the conjunctiva varies greatly in density in various regions along the eye. To start off, here is a diagram of the human eye a horizontal section of the right eye. Quantitative assessment of conjunctival microvascular.
Anatomy it is the mucous membrane covering the under surface of the lids and anterior part of the eyeball upto the cornea. The conjunctiva is divided into the following threeparts. Pdf transscleral cyclophotocoagulation and its histological effects. Understanding the basic anatomy of the human eye is a requirement for all health care providers, but it is even more significant to eye care practitioners, including ocularists. That part of the conjunctiva, a clear membrane of the eye, which covers the outer surface of the eye. Inflammation of the conjunctiva is called conjunctivitis. Anatomy and physiology find, read and cite all the research you need on researchgate. These recesses are called the upper and lower fornices, or conjunctival sacs. The conjunctiva is the mucous membrane that lines the eyelid and covers the visible portion of the eyeball except the cornea the transparent part of the eyeball that covers the iris and the pupil. Learn about their function and problems that can affect the eyes.
Clinical anatomy and physiology of the visual system, 3rd edition. Ex vivo conjunctival retention and transconjunctival. The anatomy and cell biology of the human cornea, limbus, conjunctiva, and adnexa ilene k. This education module, ocular anatomy was originally prepared by. Conjunctival flora of normal human eye jscimed central. At the margins of the lids it becomes continuous with the lining membrane of the ducts of the tarsal glands, and, through the lacrimal ducts, with the lining membrane of the lacrimal sac and. The majority of the blood supply for the bulbar conjunctiva near the limbus is derived from the anterior ciliary arteries. Between the bulbar and the palpebral conjunctiva there are two loose, redundant portions forming recesses that project back toward the equator of the globe. Eye anatomy thomas c litzinger,miami university, oxford, ohio, usa katia del riotsonis,miami university, oxford, ohio, usa the eye is a small yet multifaceted unit. Conjunctiva definition and detailed illustration all about vision. The palebral conjunctiva lines the underside of the eyelids, while the bulbar conjunctiva covers the front of the eyeball itself. Histological images of the conjunctiva first two rows and ciliary body. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Its wall has three distinct layersan outer fibrous layer, a.
Feb 23, 2014 everything you want to know about eye allergies. Anatomy, head and neck, eye conjunctiva statpearls ncbi. Spreading sarscov2 through ocular fluids pdf to download. A total of 200 conjunctival swabs from 100 patients with healthy eyes were sent for microbiological evaluation to describe the various microorganisms isolated as normal flora of conjunctiva. Correlate the structure of the conjunctiva with its functions and clinical presentations in common clinical disorders. Conjunctiva anatomy the interior surface of the eyelids and the anterior surface of the eyeball is lined with a thin membrane which secrete mucous. The other part of the conjunctiva is the palpebral conjunctiva, which lines the inside of the eyelids. Allergies affect hundreds of millions of people worldwide and oculareye allergy affects approximately one in five people worldwide. There also is a test for color deficiency and three short quizzes. Introduction conjoin to join so the name conjuctiva has been given to this mucous membrane owing to the fact that it joins the eyeball to the lids it is a translucent mucous membrane which lines the posterior surface of. The bulbar conjunctiva 2 covers the eyeball and extends into the recess created by forniceal conjunctiva 3. Conjunctiva institute for quality and efficiency in health care iqwig terms to know cornea the transparent part of the eye that covers the iris and the pupil and.
Human eye, specialized sense organ in humans that is capable of receiving visual images, which are relayed to the brain. Transparent mucous membrane which lines the inner surfaces of the eyelids and is reflected over the anterior surface of the eye ball before terminating at the limbus. A pictorial anatomy of the human eyeanophthalmic socket. For instance, a common cause of corneal pannus is contact lens wear, particularly if the contacts are illfitting. The lens changes shape when pulled by muscles around its edges. The bulbar conjunctiva is divided into scleral and limbal parts. Nurcahya ardian bramantha,spm learning objectives at the end of the session the students would be able to. The conjunctiva is highly vascularised, with many microvessels easily accessible for imaging studies. The human conjunctiva is a richly vascularized transparent tissue that provides both protection and lubrication to the eye and is readily accessible for examination by a variety of techniques.
The regional variation of the conjunctiva start with an overview in a photograph in which the patient is looking up. These three regions, shown diagrammatically and histologically in figs. The conjunctiva is a tissue that lines the inside of the eyelids and covers the sclera it is. The conjunctiva is a tissue that lines the inside of the eyelids and covers the sclera the white of the eye. The type of eye anatomy that ocularists know, however, is more abstract, as the anatomy has been altered from its natural form. Conjunctiva tunica conjunctiva anatomy, medical imaging. That part of the conjunctiva, a clear membrane of the eye, which covers the outer surface of the eye the other part of the conjunctiva is the palpebral conjunctiva, which lines the inside of the eyelids. Anatomy and physiology of the cornea sciencedirect. The conjunctiva covers the posterior surface of the eyelids palpebral conjunctiva, curves anteriorly at the fornix to reflect onto the anterior surface of the eye as the bulbar conjunctiva. To describe the conjunctival flora of normal human eye which vary with.
1102 454 241 491 1338 728 797 676 365 999 891 1145 305 145 379 391 13 784 515 836 585 1249 140 560 92 1307 25 1345 801 404 528 841 1286 181 497 1148 141 1438 144 222 303 1184 3 110