The three sentences are:
The eyelids are multilamellar structures that cover and protect the eyeball. They assist in distributing tears and providing protection from excessive light, dryness, and particles. The anatomy of the eyelid includes skin, muscles like the orbicularis oculi and levator palpebrae superioris, glands, blood vessels, and nerves that allow it to perform functions like blinking and maintaining the tear film.
1. Introduction Gross anatomy Layers Blood supply, drainage and nerve supply
2. INTRODUCTION • Sclera forms posterior 5/6th of external tunic , connective tissue coat of eyeball. • it continues with duramater and cornea • Its whole surface covered by tenon’s capsule • Anteriorly covered by- bulbar conjunctiva • Inner surface lies in contact with choroid • With a potential suprachoroidal space in between
3. Equa THICKNESS OF SCLERA
4. • Thickness varies with individual, with age • Thinner- children, elder, F> M • Thickest posteriorly • Gradually becomes thinner when traced anteriorly • Thin at insertion of extraocular muscle
Each eyelid contains a fibrous plate, called a tarsus, that gives it structure and shape; muscles, which move the eyelids; and meibomian (or tarsal) glands, which secrete lubricating fluids. The lids are covered with skin, lined with mucous membrane, and bordered with a fringe of hairs, the eyelashes.
1. Introduction Gross anatomy Layers Blood supply, drainage and nerve supply
2. INTRODUCTION • Sclera forms posterior 5/6th of external tunic , connective tissue coat of eyeball. • it continues with duramater and cornea • Its whole surface covered by tenon’s capsule • Anteriorly covered by- bulbar conjunctiva • Inner surface lies in contact with choroid • With a potential suprachoroidal space in between
3. Equa THICKNESS OF SCLERA
4. • Thickness varies with individual, with age • Thinner- children, elder, F> M • Thickest posteriorly • Gradually becomes thinner when traced anteriorly • Thin at insertion of extraocular muscle
Each eyelid contains a fibrous plate, called a tarsus, that gives it structure and shape; muscles, which move the eyelids; and meibomian (or tarsal) glands, which secrete lubricating fluids. The lids are covered with skin, lined with mucous membrane, and bordered with a fringe of hairs, the eyelashes.
This is an educational presentation on contents of orbit. The presentation includes anatomy of bony orbit, eyelids, conjunctiva, lacrimal glands and extra ocular muscles with their action explained in detail.
This lecture includes anatomy, Physiology of eyelids, if u like it kindly share it with colleagues and like it. I will share more lectures related to eye anatomy and optometry.
Thank You.
Conjunctivitis is an inflammation or swelling of the conjunctiva. The conjunctiva is the thin transparent layer of tissue that lines the inner surface of the eyelid and covers the white part of the eye. Often called "pink eye".
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
HOT NEW PRODUCT! BIG SALES FAST SHIPPING NOW FROM CHINA!! EU KU DB BK substit...GL Anaacs
Contact us if you are interested:
Email / Skype : kefaya1771@gmail.com
Threema: PXHY5PDH
New BATCH Ku !!! MUCH IN DEMAND FAST SALE EVERY BATCH HAPPY GOOD EFFECT BIG BATCH !
Contact me on Threema or skype to start big business!!
Hot-sale products:
NEW HOT EUTYLONE WHITE CRYSTAL!!
5cl-adba precursor (semi finished )
5cl-adba raw materials
ADBB precursor (semi finished )
ADBB raw materials
APVP powder
5fadb/4f-adb
Jwh018 / Jwh210
Eutylone crystal
Protonitazene (hydrochloride) CAS: 119276-01-6
Flubrotizolam CAS: 57801-95-3
Metonitazene CAS: 14680-51-4
Payment terms: Western Union,MoneyGram,Bitcoin or USDT.
Deliver Time: Usually 7-15days
Shipping method: FedEx, TNT, DHL,UPS etc.Our deliveries are 100% safe, fast, reliable and discreet.
Samples will be sent for your evaluation!If you are interested in, please contact me, let's talk details.
We specializes in exporting high quality Research chemical, medical intermediate, Pharmaceutical chemicals and so on. Products are exported to USA, Canada, France, Korea, Japan,Russia, Southeast Asia and other countries.
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
263778731218 Abortion Clinic /Pills In Harare ,sisternakatoto
263778731218 Abortion Clinic /Pills In Harare ,ABORTION WOMEN’S CLINIC +27730423979 IN women clinic we believe that every woman should be able to make choices in her pregnancy. Our job is to provide compassionate care, safety,affordable and confidential services. That’s why we have won the trust from all generations of women all over the world. we use non surgical method(Abortion pills) to terminate…Dr.LISA +27730423979women Clinic is committed to providing the highest quality of obstetrical and gynecological care to women of all ages. Our dedicated staff aim to treat each patient and her health concerns with compassion and respect.Our dedicated group ABORTION WOMEN’S CLINIC +27730423979 IN women clinic we believe that every woman should be able to make choices in her pregnancy. Our job is to provide compassionate care, safety,affordable and confidential services. That’s why we have won the trust from all generations of women all over the world. we use non surgical method(Abortion pills) to terminate…Dr.LISA +27730423979women Clinic is committed to providing the highest quality of obstetrical and gynecological care to women of all ages. Our dedicated staff aim to treat each patient and her health concerns with compassion and respect.Our dedicated group of receptionists, nurses, and physicians have worked together as a teamof receptionists, nurses, and physicians have worked together as a team wwww.lisywomensclinic.co.za/
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
1. Anatomy of the Eyelid
dr. Frenky R. de Jesus
National Eye Centre
Postgraduate diploma in Ophthalmology
2. Anatomy of the eyelid
Introduction
• Is a mobile, flexible, multilamellar structure that covers globe anteriorly.
• Assist in distribution of tears over the anterior surface of the eyeball.
• Provide protection from excessive light, desiccation and air borne foreign
matter.
3. Anatomy of the eyelid
Embryology
Eyelid development
(A) Eyelid fusion (8 to 10 weeks' gestation)
(B) Development of margin structures (3 to 4 months' gestation); eyelid dysjunction
(5 to 6 months gestation).
4. Anatomy of the eyelid
Anatomy
• From eyebrow downward to end in a free
margin
• Superior boundary of palpebral fissure.
EXTENTION
• Orbital & tarsal portion
• Formed by fibrous slips, from tendon of
levator
Upper eyelid
Lower eyelid
Superior Lid folds
Inferior Lid folds
• Merge into skin of cheek, where
nasojugal, malar sulci limit it.
• On skin of lower eyelids
• Fibrous slips from fascia of inferior rectus
LIDSFOLDS
5. Anatomy of the eyelid
Position of eyelid
In primary position of gaze
• Upper eyelid covers 1/6
th
of cornea
• Lower eyelid just touches the cornea
Anatomy
Eyelids meet at medial and lateral canthi
Canthi
Lateral canthus
Medial canthus
• 5-7 mm from the lateral orbital margin
• 1 cm from frontozygomatic suture.
• 60 degrees with eyes wide open.
• 30-40 degrees with eyes open in normal way.
• Rounded, more obtuse.
• Has a horizontal lower rim, superiorly sloping, inferomedially continues to a ridge produce by
medial palpebral ligaments.
6. Anatomy of the eyelid
• The two eyelids are separated by lacus lacrimalis, in the centre of which is a
small pinkish elevation;
• The caruncula lacrimalis. It is a small area of tissue derieved from skin,
contains large modified sweat glands and sebaceous glands.
• A semilunar fold called plica semilunaris lies on lateral side of caruncle.
Represents the third eye lid of other vertebrae.
Anatomy
7. Anatomy of the eyelid
• 2 mm in width.
• Lacrimal punctum.
• Divided into 2:
Anatomy
Eyelid margin
• Grey Line - junction of skin and
conjunctiva.
• Lid vascularity increases with
age, particularly in women.
✴ Lacrimal portion - punctum to medial canthus.
✴ Ciliary portion; rounded anterior, sharp posterior, inter-
marginal strip.
8. Anatomy of the eyelid
• Eyelashes
• 2-3 rows
• When lids close eyelashes do not interlace
• Upper lid : 100-150
Lower lid : 50-75
• Cilia
Anatomy
Eyelashes
✴ 20 – 120 microns
✴ Taper & end in fine point
✴ Lifespan 5 months.
✴ Replacement is fully grown in 10 wks.
• Glands of Zeis & Moll-empty into infundibulum of each piliary gland
Ciliary follicles
Cilia have no erector muscles set obliquely, anterior to palpebral muscle reach
the tarsal plate, have a sensory innervation.
9. Anatomy of the eyelid
• Elliptical space between upper & lower lid margins
• At Birth
✴ Horizontally: 18 to 21 mm
✴ Vertically: 8mm
Anatomy
Palpebral aperture
• In Adults
✴ Horizontally: 28 to 30mm
✴ Vertically: 9 to 11mm
10. Anatomy of the eyelid
1. Skin
2. Subcutaneous Areolar Tissue
3. Layers of Striated Muscles
4. Submuscular Areolar Tissue
5. Fibrous Layer
6. Non Striated Muscles Fibres
7. Conjunctiva
Layers of the Eyelid
11. Anatomy of the eyelid
• Palpebral skin is thinnest in body (<1 mm)
• Elastic & folds easily contributing to speed of
mobility of upper eyelid
• Nasal skin:
✴ Smoother and more oily
✴ Few rudimentary hairs
1. Skin
Layers of the Eyelid
• Lateral skin:
✴ Numerous sweat gland
•Epidermis
✴ Consists of 6-7 layers of stratified squamous epithelium
✴ Unicellular sebaceous glands & sweat glands
•Dermis
✴ Dense connective tissue
✴ Rich network of elastic fibers, blood vessels, lymphatics & nerves.
✴ Many unicellular sebaceous glands (hence Xanthelasma
develops on the nasal side)
12. Anatomy of the eyelid
• Loose connective tissue arrangement
• No fat
• Applied anatomy:
✴ Fluid from oedema or haemorrhage rapidly engorges into the loose
subcutaneous eyelid tissue & produce swelling of eyelids
2. Subcutaneous Areolar Tissue
Layers of the Eyelid
3. Layers of Striated Muscles
Consists of:
✴ Orbicularis oculi (forms thin oval sheet
over eyelid)
• Complex striated muscle sheet
• Divided anatomically into;
✴ Orbital
✴ Palpebral (Pretarsal & Preseptal)
✴ Upper eyelid also contains Levator
palpebral superioris.
13. Anatomy of the eyelid
Layers of the Eyelid
Horner’s Muscle:
• Prominent bundle of fibers, formed by fusion of the
deep heads of the pretarsal orbicularis
• Runs just behind the posterior limb of the canthal
tendon.
• Insertion – posterior lacrimal crest
• Functions:
✴ Helps to maintain the posterior position of the
canthal angle
✴ Tightens the eyelids against the globe during
eyelid closure
✴ Aids in the lacrimal pump mechanism
Muscle of Riolan
• Small bundle of striated muscle fibers at the eyelid
margin
• Extension of pretarsal portion of orbicularis oculi
fibers
Function:
• Keep the lids in close apposition to the globe
14. Anatomy of the eyelid
Upper lid
✴ Levator palpabrae superioris
✴ Muller’s muscle
Layers of the Eyelid
Eyelid retractor
• Major eyelid retractor
• Origin:
✴ At the apex of orbit from the under Surface of lesser wing of the sphenoid
above annulus of zinn
• Course and attachment:
✴ Passes forward below the roof of the orbit, above the superior rectus
✴ At septum orbital, it fans out into white tendon called aponeurosis of LPS
and forms medial and lateral horns.
✴ Levator Palpebral Superioris
Lower lid
✴ Capsulopalpebral fascia
15. Anatomy of the eyelid
• Sympathetic accessory retractor of upper eyelid
• Modulates the position of the upper and lower eyelid when the eye is open
• Origin – From under surface of the LPS
• Insertion – orbital margin of the tarsal plateMuller’s muscle
16. Anatomy of the eyelid
✴ Capsulopalpebral Fascia
• Fibrous sheet in the lower eyelid, that arises from the Lockwood’s ligament
• Fuses with fibers of the orbital septum, forms a common fascial sheet & inserts
onto the lower border of the tarsal plate
17. Anatomy of the eyelid
• Present between orbicularis muscle & fibrous layer
• Superiorly communicates with the subaponeurotic stratum of the scalp
• This plane can be entered by incision at the grayline
• The nerves & vessels of the eyelids also lie in this layer, and so to anaesthetise the lid,
injection is made in this plane.
4. Submuscular Areolar Tissue
5. Fibrous layer
• Framework of lid
• Consists of:
✴ Central thick part Tarsal Plate
✴ Peripheral thin part of the Septum Orbital
6. Non Striated MusclesFibres
• Consists of smooth muscles fibres of Muller’s muscles which lie just deep to septum
orbitale in upper & lower lid
• Origin:
✴ From the inferior terminal striated fibres of LPS in Upper Eye Lid & expansion of inferior
rectus in the Lower Eye Lid
✴ Runs vertically & gets inserted in the orbital margin of the tarsal plate
• Supplied by sympathetic nerves
18. Anatomy of the eyelid
• Tarsal/Meibomian Glands
• Gland of Zeis
• Gland of Moll
Glands of the Eyelid
a) Tarsal/Meibomian Glands
• Modified sebaceous gland
• Present on the posterior part of stroma of tarsal plate
• 30 - 40 no. in upper eyelid & 20-30 no. in lower eyelid
• Oily secretion
• Functions:
✴ Forms hydrophobic barrier at the margin of the eyelid, preventing
spillage of tears at the lid margin
✴ Forms oily layer of tear film over cornea &bulbar conjunctiva
Retards evaporation of tears.
19. Anatomy of the eyelid
b) Glands of Zeis
• Modified sebaceous glands
• Attached to eyelash follicles (usually two glands with each cilium)
• Sebum secretion
• Functions: Prevents eyelashes from being dry & brittle
c) Glands of Moll
• Modified sweat gland
• Lies between cilia
• Numerous in lower lid than upper lid
21. Anatomy of the eyelid
• Act to protect the anterior surface of the globe from local injury.
• Aid in regulation of light reaching the eye.
• Tear film maintenance by distributing the protective optically
important tear film over the cornea during blinking.
• Tear flow by their pumping action on the conjunctival sac and
lacrimal sac.
Functions of the Eyelid
22. Anatomy of the eyelid
Motor Nerve Supply:
• Motor nerves to the orbicularis oculi muscle - facial nerve (temporal &
zygomatic branches)
• Motor nerve to the levator palpebrae superioris - superior division of
oculomotor nerve
• Motor nerve to the Müller muscle - sympathetic nervous system.
Nerve supply of the Eyelid
Sensory Nerve Supply: ophthalmic & maxillary divisions of the trigeminal nerve
• Upper eyelid - supraorbital, supratrochlear & lacrimal nerves (ophthalmic division)
• Lateral portion of upper eyelid & zygomaticotemporal - branch of the maxillary
nerve.
• Extreme Medial portion of both upper & lower eyelid - infratrochlear nerve.
• Lower eyelid - infraorbital nerve (maxillary division)
• Lateral portion of lower eyelid - zygomaticofacial branch of the maxillary nerve
24. Anatomy of the eyelid
Upper eyelid
• Marginal Arcade – 2-3 mm from the eyelid margin; either between the tarsal
plate & the orbicularis or within the tarsus
• Peripheral Arcade - along the upper border of tarsal between the levator
aponeurosis & Müller muscle supplied by superior medial palpebral vessel (the
terminal ophthalmic artery and superior lateral palprebal Vessel from lacrimal
artery)
Lower eyelid:
By medial and lateral palpebral vessel
Vascular supply of the Eyelid
27. Anatomy of the eyelid
• Not well defined
• Can be divided into two portions: a superficial, or pretarsal system & a deep,
or posttarsal system
• Mainly into several large vessels of the facial system
Venous drainage system
28. Anatomy of the eyelid
Two systems - superficial and
deep system.
• Superficial system- drains skin
and orbicularis oculi.
• Deep system- drain tarsi and
conjunctiva.
• Upper lid, lateral 1/3 of lower
lid and lateral canthus ->
preauricular Lymph Node
and deep parotid nodes ->
deep cervical Lymph Node.
• Medial part of Upper lid,
medial 2/3 of Lower Lid and
medial canthus ->
submandibular Lymph Node
-> internal jugular vein.
Lymphatic drainage system