The examiner should be alert to any reddening, secretion, thickening, scars, or foreign bodies. For ophthalmologists, optometrists, medical, dental, and optometry students, eye anatomy forms the basis for eyepathology in diseases. Ibrite works by removing the conjunctiva membrane, which then regrows after the procedure. 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. External ocular appearance transmits and refracts light from the front to. This resource includes descriptions, functions, and problems of the major structures of the human eye. The limbus 1 is the junction of the conjunctiva and cornea. Conjunctiva national library of medicine pubmed health. 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. Parts of the conjunctiva conjunctiva palpebral marginal tarsal orbital bulbar scleral limbal fornix superior inferior lateral medial 7. 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. 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.
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. Learn conjunctiva with free interactive flashcards. Labbe 1, 2 1department of ophthalmology iii, clinical investigation center cic 503, quinzevingts. This area serves as an anatomic window to access the medial upper eyelid fat pad with a high degree of safety. 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 conjunctiva of the fornix is continuous with the skin and lies between bulbar and palpebral conjunctiva. In the lower lid, it is adherent only to half width of the tarsus. The bulbar conjunctiva bulbar portion upon the sclera, the conjunctiva is loosely connected to the bulb of the eye. Anatomy of conjunctiva free download as powerpoint presentation. Noonan contribution from schools of chemical engineering and biomedical engineering, georgia institute of technology, atlanta, georgia 303320100. 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. The bare area was further elucidated during these dissections and its. 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. The tunica conjunctiva consists of an epithelial layer and a connectivetissue base.
Basically, the papillae represent a vascular response with an exaggeration of some aspects of the normal conjunctival anatomy. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 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. This portion of the conjunctiva covers the anterior part of the sclera the white of the eye. 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 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. Faiz bin mazlan 0308187 batch 4 parts of conjuctiva palpebral conjuctiva conjunctiva which lines the undersurface or posterior surface of the eyelid. The conjunctiva is the mucosal surface that extends from the corneoscleral limbus to the eyelid margins and caruncle. Transparent mucous membrane which lines the inner surfaces of the eyelids and is reflected over the anterior surface of the eye ball before. Understand how the photoreceptors, specialized cells in the re2na, allow the eye to process light. Anatomy of conjunctiva epithelium human head and neck.
It is composed of unkeratinized, stratified squamous epithelium with goblet cells, and stratified columnar epithelium. Examination of the conjunctiva visual acuity alpf medical. Bulbar conjunctiva lies loose over the underlying structures and thus can be moved easily. The normal conjunctiva is smooth, shiny, and moist. Pseudostratified columnar epithelium rich in goblet cells may mimic dysplasia contains accessory lacrimal tissue, ductules of main lacrimal gland and lymphoid follicles. Structure and anatomy of the eye learning objec8ves through examining images from the memento muer exhibit memento. The conjunctiva is the clear, thin membrane that covers part of the front surface of the eye and the inner surface of the eyelids. It covers the sclera, then folds back to line the eyelids. Dartt introduction the conjunctiva is a thin, semitransparent mucous membrane that covers the posterior surface of the eyelids and is then reflected onto the eyeball, where it extends to the limbus of the cornea.
In the area of limbus, the conjunctiva, tenonscapsule and the episcleral tissue. The conjunctiva helps lubricate the eye by producing mucus and tears, although a smaller volume of tears than the lacrimal gland. Many important functions are performed by the conjunctiva including. Conjunctiva is the major supporting tissue of the ocular surface. The palpebral conjunctiva is tightly bound to the inner surface of the lids. Anatomy of conjuctiva free download as powerpoint presentation. It is separated from the anterior sclera by episcleral tissue and tenonscapsule. It can also be caused by a chemical burn or mechanical injury, or it may be part of an. For ophthalmologists, optometrists, medical, dental, and optometry students, eyeanatomy forms the basis for eyepathology in diseases. Anatomy of the conjunctiva, limbus, anterior chamber, and. Eversion should be performed with a quick levering motion while applying slight traction. 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.
Conjunctiva definition of conjunctiva by merriamwebster. 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. A thin, mucous membrane, the conjunctiva serves to protect the front of the eyeball.
The conjunctiva contains nonkeratinizing, squamous epithelium and a. 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. It can also be caused by a chemical burn or mechanical injury, or it may be part of an allergic reaction. The iris is a slim, circular structure in the eye that lies between the cornea and the lens of the human 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 conjunctiva a thin translucent mucous membrane can be divided into palpebral, bulbar, and fornical, based on the location. Also check for 6th or 7th edition of ak khurana ophthalmology pdf format.
Ak khurana textbook of ophthalmology pdf download medicforyou. The inflammation may be caused by a viral or bacterial infection. The regional variation of the conjunctiva start with an overview in a photograph in which the patient is looking up. What is the anatomy and pathology of the conjunctiva in. Anatomy and physiology of the conjunctiva presented by arundhati hatikakoty bachelor of optometry 3rd year roll no 302 2. It contains a nonkeratinized stratified squamous epithelium that is typically three layers thick. The function of iris is to control the diameter and size of the pupil and thus the. The bulbar conjunctiva 2 covers the eyeball and extends into the recess created by forniceal conjunctiva 3. Conjunctiva palpebral conjunctiva marginal tarsal orbital bulbar conjunctiva scleral limbal conjunctival fornix. The ocular conjunctiva is also called the bulbar conjunctiva. That part of the conjunctiva, a clear membrane of the eye, which covers the outer surface of the eye. Goblet cells of conjunctiva attaches tear film to eye spreads water evenly.
A literature analysis for drug delivery to the eye mark r. May 06, 2020 the conjunctiva a thin translucent mucous membrane can be divided into palpebral, bulbar, and fornical, based on the location. Nov 27, 2017 parts of the conjunctiva conjunctiva palpebral marginal tarsal orbital bulbar scleral limbal fornix superior inferior lateral medial 7. Review article permeability of cornea, sclera, and conjunctiva. The palpebral conjunctiva extends from the mucocutaneous junction at the lid margin to the upper and lower margins of the tarsal plate. The condition is more often referred to as chemosis. Conjunctiva definition is the mucous membrane that lines the inner surface of the eyelids and is continued over the forepart of the eyeball.
There also is a test for color deficiency and three short quizzes. Conjunctiva anatomy by dr bal kishore, cell biologist and neuro anatomist. Upon the cornea, the conjunctiva consists only of epithelium, constituting the epithelium of the cornea. Feb 23, 2014 everything you want to know about eye allergies.
Ocular anatomy and physiology introduction by the end of this chapter you will be expected to possess knowledge and understanding. Choose from 500 different sets of conjunctiva flashcards on quizlet. The conjunctiva is a tissue that lines the inside of the eyelids and covers the sclera the white of the eye. The palpebral conjunctiva can then be inspected and cleaned if necessary. The conjunctiva of the fornix forms an almost continuous sac that is interrupted medially by the plica semilunaris.
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. Pradeep bastola md, ophthalmologist assistant professor gmc and teaching hospital 24052011 conjunctiva. The other part of the conjunctiva is the palpebral conjunctiva, which lines the inside of the eyelids. Chemosis of the conjunctiva is a type of eye inflammation. Read an overview of general eye anatomy to learn how the parts of the eye work together. Ak khurana is a book for third year mbbs students and is the best and recommended book for ophthalmology. The conjunctiva of the eye provides protection and lubrication of the eye by the production of mucus and tears. It prevents microbial entrance into the eye and plays a role in immune surveillance. It is continuous with the skin at the lid margin a mucocutaneous junction and with the corneal epithelium at the limbus.
Allergies affect hundreds of millions of people worldwide and oculareye allergy affects approximately one in five people worldwide. The bulbar conjunctiva is directly visible between the eyelids. 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. Tarsal conjunctiva is firmly adherent to the whole tarsal plate in the upper lid. Conjunctiva is a continuous membrane, and for practical and clinical purposes it is subdivided into palpebral, forniceal, and bulbar zones. Conjunctiva article about conjunctiva by the free dictionary. Thin ct sheet that begins approximately 2mm posterior to the limbus by fusing with the posterior side of the conjunctiva. The conjunctiva takes its name from the fact that it conjoins the eyelids with the.
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. Apr 23, 2018 conjunctiva anatomy by dr bal kishore, cell biologist and neuro anatomist. It occurs when the inner lining of the eyelids swells. Clinically they can be recognized as small elevations of the conjunctiva that produce a slightly granular or velvety. Thin transparent mucous membrane which lines the posterior aspect of eyelids and anterior aspect of the eyeball. 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.