Learn conjunctiva with free interactive flashcards. Anatomy and physiology of the conjunctiva presented by arundhati hatikakoty bachelor of optometry 3rd year roll no 302 2. Of the gross anatomy of the human eye of the physiology of the human eye how the structures function of the relation to the eyes and function of extraocular structures of the function of tears. The limbus 1 is the junction of the conjunctiva and cornea.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. The iris is a slim, circular structure in the eye that lies between the cornea and the lens of the human eye. The conjunctiva is highly vascularised, with many microvessels easily accessible for imaging studies. After outlining the relevant anatomy and physiology of this structure, the chapter addresses the key clinical presentations arising from conjunctival disease, notably infective conjunctivitis including bacterial, viral and chlamydial, allergic conjunctivitis, cicatricial. It is separated from the anterior sclera by episcleral tissue and tenonscapsule. Conjunctiva is the major supporting tissue of the ocular surface. The palpebral conjunctiva can then be inspected and cleaned if necessary. In context anatomy langen terms the difference between cornea and conjunctiva is that cornea is anatomy the transparent layer making up the outermost front part of the eye, covering the iris, pupil, and anterior chamber 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. Structure and anatomy of the eye learning objec8ves through examining images from the memento muer exhibit memento.
Examination of the conjunctiva visual acuity alpf medical. The regional variation of the conjunctiva start with an overview in a photograph in which the patient is looking up. Allergies affect hundreds of millions of people worldwide and oculareye allergy affects approximately one in five people worldwide. From the fornices the conjunctiva sweeps posteriorly to attach to and cover the eyeball, approximately 10 mm posterior to the limbus superiorly, 12 to 14 mm posterior to the limbus laterally, and 8 to 10 mm from the limbus inferiorly. Faiz bin mazlan 0308187 batch 4 parts of conjuctiva palpebral conjuctiva conjunctiva which lines the undersurface or posterior surface of the eyelid. Labbe 1, 2 1department of ophthalmology iii, clinical investigation center cic 503, quinzevingts. 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. In contextanatomylangen terms the difference between cornea and conjunctiva is that cornea is anatomy the transparent layer making up the outermost front part of the eye, covering the iris, pupil, and anterior chamber 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 examiner should be alert to any reddening, secretion, thickening, scars, or foreign bodies. The normal conjunctiva is smooth, shiny, and moist. Anatomy of conjunctiva epithelium human head and neck.
For ophthalmologists, optometrists, medical, dental, and optometry students, eye anatomy forms the basis for eyepathology in diseases. Review article permeability of cornea, sclera, and conjunctiva. The conjunctiva is a mobile mucous membrane covering the inner surface of the lids, the inner and outer surfaces of the third eyelid, and the anterior portion of the globe adjacent to the limbus figure 71. Clinically they can be recognized as small elevations of the conjunctiva that produce a slightly granular or velvety. The function of iris is to control the diameter and size of the pupil and thus the. Anatomy and physiology of the eye overview the eye is an extremely complex organ comprising myriad structures that work together to provide the sense of sight. The bulbar conjunctiva is directly visible between the eyelids.
The conjunctiva helps lubricate the eye by producing mucus and tears, although a smaller volume of tears than the lacrimal gland. Nov 27, 2017 parts of the conjunctiva conjunctiva palpebral marginal tarsal orbital bulbar scleral limbal fornix superior inferior lateral medial 7. Thin transparent mucous membrane which lines the posterior aspect of eyelids and anterior aspect of the eyeball. Tarsal conjunctiva is firmly adherent to the whole tarsal plate in the upper lid. Pradeep bastola md, ophthalmologist assistant professor gmc and teaching hospital 24052011 conjunctiva. External ocular appearance transmits and refracts light from the front to.
Conjunctiva provides the reader with a practical approach to the assessment and management of conjunctival disease. The conjunctiva the conjunctiva is the thin, transparent mucous membrane that covers the posterior surface of the lids the palpebral conjunctiva and the anterior surface of the sclera the bulbar conjunctiva. The conjunctiva is divided into the following threeparts. Conjunctiva article about conjunctiva by the free dictionary. Ak khurana is a book for third year mbbs students and is the best and recommended book for ophthalmology. Ibrite works by removing the conjunctiva membrane, which then regrows after the procedure. It is continuous with the skin at the lid margin a mucocutaneous junction and with the corneal epithelium at the limbus. Conjunctivitis, also called pinkeye, inflammation of the conjunctiva, the delicate mucous membrane that lines the inner surface of the eyelids and covers the front part of the white of the eye. 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. This portion of the conjunctiva covers the anterior part of the sclera the white of the eye. Palpebral conjunctiva marginal conjunctiva extends from the lid margin to about 2 mm on the back of lid up to a shallow groove, the sulcus subtarsalis. The palpebral conjunctiva extends from the mucocutaneous junction at the lid margin to the upper and lower margins of the tarsal plate.
Conjunctiva tunica conjunctiva anatomy, medical imaging. The conjunctiva is a loose connective tissue that covers the surface of the eyeball bulbar conjunctiva and reflects back upon itself to form the inner layer of the eyelid palpebral conjunctiva. The bulbar conjunctiva 2 covers the eyeball and extends into the recess created by forniceal conjunctiva 3. Ocular anatomy and physiology introduction by the end of this chapter you will be expected to possess knowledge and understanding. It prevents microbial entrance into the eye and plays a role in immune surveillance. This area serves as an anatomic window to access the medial upper eyelid fat pad with a high degree of safety. Thin ct sheet that begins approximately 2mm posterior to the limbus by fusing with the posterior side of the conjunctiva. Anatomy of conjuctiva free download as powerpoint presentation.
The inflammation may be caused by a viral or bacterial infection. Feb 23, 2014 everything you want to know about eye allergies. It occurs when the inner lining of the eyelids swells. A literature analysis for drug delivery to the eye mark r. The ocular conjunctiva is also called the bulbar conjunctiva. It envelopes the globe, separating it from the surrounding retroorbital fat and is perforated posteriolaterally to allow passage of the optic nerve, ciliary vessels and nerves and tendon to the four recti3. The conjunctiva is the clear, thin membrane that covers part of the front surface of the eye and the inner surface of the eyelids. 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 eyelids and anterior aspect of the eyeball. The conjunctiva of the fornix is continuous with the skin and lies between bulbar and palpebral conjunctiva. It can also be caused by a chemical burn or mechanical injury, or it may be part of an allergic reaction. Anatomy of conjunctiva free download as powerpoint presentation.
May 06, 2020 the conjunctiva a thin translucent mucous membrane can be divided into palpebral, bulbar, and fornical, based on the location. The conjunctiva is a tissue that lines the inside of the eyelids and covers the sclera the white of the eye. It can also be caused by a chemical burn or mechanical injury, or it may be part of an. Conjunctiva palpebral conjunctiva marginal tarsal orbital bulbar conjunctiva scleral limbal conjunctival fornix. The other part of the conjunctiva is the palpebral conjunctiva, which lines the inside of the eyelids. What is the anatomy and pathology of the conjunctiva in. In the lower lid, it is adherent only to half width of the tarsus. The conjunctiva is the transparent mucous membrane that covers the posterior surface of the lids and the anterior surface of the eyeball as far as the cornea. Basically, the papillae represent a vascular response with an exaggeration of some aspects of the normal conjunctival anatomy. In its tarsal portion, the connective tissue elements of the latter form a fine network creating a papillary structure, but towards the fornices it is looser and contains elastic fibres, blood vessels. In the area of limbus, the conjunctiva, tenonscapsule and the episcleral tissue. The conjunctiva of the fornix forms an almost continuous sac that is interrupted medially by the plica semilunaris. Many important functions are performed by the conjunctiva including. The conjunctiva a thin translucent mucous membrane can be divided into palpebral, bulbar, and fornical, based on the location.
Conjunctiva anatomy by dr bal kishore, cell biologist and neuro anatomist. The tunica conjunctiva consists of an epithelial layer and a connectivetissue base. Conjunctiva national library of medicine pubmed health. The condition is more often referred to as chemosis. There also is a test for color deficiency and three short quizzes. To clarify the anatomy of this approach, an anatomic study of the upper medial eyelid was performed on the orbits of 10 cadavers 20 orbits. An understanding of the anatomy and physiology of the visual system provides eye care professionals and staff with a valuable tool when meeting their patients needs and expectations.
Choose from 500 different sets of conjunctiva flashcards on quizlet. Upon the cornea, the conjunctiva consists only of epithelium, constituting the epithelium of the cornea. The bulbar conjunctiva bulbar portion upon the sclera, the conjunctiva is loosely connected to the bulb of the eye. Ak khurana textbook of ophthalmology pdf download medicforyou. That part of the conjunctiva, a clear membrane of the eye, which covers the outer surface of the eye. Conjunctiva definition is the mucous membrane that lines the inner surface of the eyelids and is continued over the forepart of the eyeball. Anatomy of the conjunctiva, limbus, anterior chamber, and. Marginal conjunctiva it starts from the intermarginal strips of the eyelid continuation of the skin in to the back or posterior surface of the lid up to shallow groove or fold. This resource includes descriptions, functions, and problems of the major structures of the human eye. Bulbar conjunctiva lies loose over the underlying structures and thus can be moved easily. Eversion should be performed with a quick levering motion while applying slight traction. Apr 23, 2018 conjunctiva anatomy by dr bal kishore, cell biologist and neuro anatomist.
The space lined by the conjunctiva is called the conjunctival sac. The palpebral conjunctiva is tightly bound to the inner surface of the lids. The conjunctiva is the mucosal surface that extends from the corneoscleral limbus to the eyelid margins and caruncle. Parts of the conjunctiva conjunctiva palpebral marginal tarsal orbital bulbar scleral limbal fornix superior inferior lateral medial 7. Noonan contribution from schools of chemical engineering and biomedical engineering, georgia institute of technology, atlanta, georgia 303320100. Chemosis of the conjunctiva is a type of eye inflammation.
The conjunctiva takes its name from the fact that it conjoins the eyelids with the. Pseudostratified columnar epithelium rich in goblet cells may mimic dysplasia contains accessory lacrimal tissue, ductules of main lacrimal gland and lymphoid follicles. Also check for 6th or 7th edition of ak khurana ophthalmology pdf format. Conjunctiva definition of conjunctiva by merriamwebster. For ophthalmologists, optometrists, medical, dental, and optometry students, eyeanatomy forms the basis for eyepathology in diseases. Understand how the photoreceptors, specialized cells in the re2na, allow the eye to process light. The conjunctiva contains nonkeratinizing, squamous epithelium and a.
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. A thin, mucous membrane, the conjunctiva serves to protect the front of the eyeball. It covers the sclera, then folds back to line the eyelids. It contains a nonkeratinized stratified squamous epithelium that is typically three layers thick. Goblet cells of conjunctiva attaches tear film to eye spreads water evenly.