diseases of the conjunctiva - prime.edu.pk o… · classify diseases of the conjunctiva 2. identify...
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DISEASES OF THE
CONJUNCTIVA AYESHA S ABDULLAH
13.09.2014
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LEARNING OUTCOMES
By the end of this lecture the students would be able to;
1. Classify diseases of the conjunctiva
2. Identify the common symptoms and signs of conjunctival diseases
3. Identify the common symptoms and signs of conjunctival diseases
4. Enlist the causes & risk factors of conjunctivitis.
5. Differentiate between bacterial, viral, chlamydial and allergic conjunctivitis on the basis of clinical presentation.
6. Describe the associated complications, treatment and prevention strategies for each type of conjunctivitis.
7. Identify Pterygium on photographs, describe its pathogenesis, complications and treatment.
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Classification of conjunctival diseases
Inflammatory
infective & non-infective conditions like conjunctivitis
Degenerative disorders
Pinguecula, Pterygium, concretions and cysts
Neoplastic
Saquamous cell carcinoma, melanoma, lymphoma etc
Miscellaneous disorders
Dry eyes
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Symptomatology
Red eye
Watering (lacrimation)
Irritation, stinging, burning and foreign body sensation
Itching
Blurring vision/ decreased vision, Photophobia and pain (danger alarm)
Growth or mass in the eye
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SIGNS Redness ; conjunctival redness
Discharge
Follicle & papillae
Phylectenule
Conjunctival oedema
Presence of membrane/
pseudomembrane
Subconjunctival haemorrhage
Lymphadenopathy
Keratinization
Scarring
Pigmentation
Mass
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REDNESS; CONJUNCTIVAL REDNESS
Superficial
Maximum at the fornices and fades
towards the limbus
Mild to severe
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Conjunctival congestion Ciliary congestion
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DISCHARGE
What is discharge?
Reflex tearing and exudative response of the inflamed
conjunctiva mixed with mucus
Serous; watery exudate in acute viral and acute
allergic conjunctivitis.
Mucoid; mucus discharge in Vernal Kerato Conjunctivitis
(VKC) and dry eyes.
Purulent; puss in severe acute bacterial conjunctivitis.
Mucopurulent; puss plus mucus in mild bacterial
conjunctivitis and Chlamydial conjunctivitis.
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Ophthalmia neonatorum
Bacterial conjunctivitis
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Follicular reaction
Sub epithelial foci of hyperplastic lymphoid tissue
More prominent in fornices.
Multiple, discrete, slightly elevated,
Size from 0.5 to 5 mm.
Commonly seen in Viral conjunctivitis, Chlamydial
conjunctivitis & in cases of hypersensitivity to topical
medications.
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15
What are papillae?
Papillary reaction
Hyperplastic conjunctival epithelium with central core
vessel surrounded by infiltrate separated from each
other by fibrous septa- seen in allergic & bacterial
conjucntvitis
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Papillary reaction
Can develop in palpebral conjunctiva and limbus- why?
Giant papilla (confluence)
make the conjunctiva look rough and velvety
Difficult to see the underlying conjunctival vessels
Seen in Allergic conjunctivitis, Bacterial conjunctivitis, Chronic blepharitis, Contact lens wearers
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17
Cobblestone papillae
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Phylectenule
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Conjunctival oedema- chemosis
it can happen in acute inflammation of the
conjunctiva as in acute infective/allergic
conjunctivits, orbital disorders (obstructing the
outflow of lymph and venous drainage) and certain
systemic conditions (acute nephritis, lymphoma)
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Conjunctival oedema- chemosis
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Membranes & Pseudomembrane
Coagulated exudate adherent to the inflamed epithelium.
Can be easily pealed off.
Causes; Severe adenoviral infection, Ligneous conjunctivitis, Gonococcal conjunctivitis, Stevens-Johnson syndrome
True conjunctival membrane infiltrates the superficial layers of conjunctival epithelium.
Conjunctiva bleeds if attempted to be removed.
Causes; infection with Diphtheria & Beta-hemolytic Streptococci and Neisseria Gonorrhoeae.
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Subconjunctival Haemorrhage
Can happen in severe cases of viral or bacterial
conjunctivitis
Trauma
Haemotological disorders (bleeding disorders,
leukaemias)
Fracture base of the skull
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Traumatic subconjunctival haemorrhage
Adenoviral conjunctivitis subconjunctival haemorrhage
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Lymphadenopathy
Pre auricular and sub mandibular.
In ; Viral infection, Chlamydial infection
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Systemic symptoms in conjunctivitis
Severe conjunctivitis with
Gonococcus,
Meningococcus,
Chlamydia
H.Influenzae
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Diagnosis
Bacterial
Symptoms
Acute onset
Bilateral with one eye affected a day or two earlier
Discharge is purulent or mucopurulent
Glued eyelashes in the morning
Signs
Lid swelling in severe cases
Conjucntival redness
Punctate corneal epithalial erosion are common
Peripheral corneal ulceration may in gonococcal and meningococcal infection rapidly progressing to perforation.
Lymph adenopathy usually absent (except in gonococcal and meningococcal infection
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Diagnosis
Viral
Symptoms
Acute onset watering, redness, discomfort & photophobia
Usually bilateral
Lid swelling
Signs
Conjunctiva:
Follicular conjunctivitis.
Mild-moderate chemosis.
Subconjunctival Haemorrhage.s
Pseudomembrane & membrane formation.
Tender pre-auricular lymphadenopathy.
Keratitis (80%)- 7 to 10 days later in the form of superficial punctate keratitis, subepithelial opacities and may remain for quite a long time.
Conjunctival scarring (rare)
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Kanski 7th ed
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Treatment of conjunctivitis
Bacterial conjunctivitis
Topical : Aminoglycosides, quinolones, polymxin B,
Fusidic Acid, chloroamphenicol, Bacitracin
Systemic in some cases?
Lid hygiene
Contact lens wear to be discontinued till the
antibiotic therapy is completed
Hand washing and avoid sharing towels
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Treatment of conjunctivitis
Viral conjunctivitis
Spontaneous resolution within 2-3 weeks.
Symptomatic & supportive treatment with
Topical steroids to be avoided
Antivirals are ineffective
Reduce the risk of transmission
Hand hygiene
Avoid eye rubbing & towel sharing
Disinfection of eye instruments after examination
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Ophthalmia neonatorum
Conjunctitivitis of the new born
Onset
Chemical…. First few days
Gonococcal…1st Week
Staphlococcal and other bacteria….End of 1st week
Herpes Simplex…..1-2 weeks
Chlamydia…..1-3 weeks
Treatment of conjunctivitis
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Treatment
Mild –moderate cases topical antibiotic eye drops
and ointment
Systemic antibiotics and anitviral therapy
Gonococcal, Chlamydial and Herpes Simplex
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Allergic conjunctivitis
Acute allergic conjunctivitis
Seasonal conjunctivitis
Vernal Keratoconjunctivitis
Atopic Keratoconjunctivitis
Giant Papillary conjunctivitis
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VKC
Recurrent & Bilateral
IgE & cell-mediated reaction
Common in males
Age-5 to late teens
Remission in late teens
Symptoms & Signs occur on seasonal basis.
Peak Incidence: April - August.
More common in warm, dry climates
Associated with other allergic disorders like?
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Signs-Palpeberal type
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Signs- Limbal type Tranta’s dots
Limbal papillae
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Complications
Keratopathy
Side effects of steriods; Cataract & Glaucoma
Associations
Keratoconus
Herpes simplex keratitis
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Corneal complications
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Treatment
Allergen avoidance
Drugs
Mast cell stabilizers
Antihistamines
NSAIDs
Steroids
Decongestants
Lubricants
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Other signs
Keratinization
Vitamin A deficiency
Systemic Immune disorders
Ocular pemphigoid
Stevens-Johnson Syndrome
KCS
Scarring
Chemical burns or mechanical trauma
Immune disorders
Chronic conjunctivitis (Trachoma)
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Conjucntival Growth /mass
Benign ; cysts, pterygium, lipodermoid
Malignant ; melanoma, squamous cell carcinoma
and others
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Benign Growths
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Pterygium
A degenerative condition
Triangular, fibrovascular connective tissue overgrowth of bulbar conjunctiva onto the cornea usually on the nasal side
Can reduce vision through producing Astigmatism and corneal opacity
Many treatment modalities have been tried but so far the best option with least recurrence rate is excision of the pterygium with conjunctival autograft.
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Laboratory Investigations
Indications
Severe purulent conjunctivitis
Follicular conjunctivitis: viral vs chlamydial
Conjunctival inflammation
Neonatal conjunctivitis
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Laboratory Investigations
Cytological investigations
Cultures
Detection of viral and chlamydial antigens.
Impression cytology
Polymerase chain reaction for adenovirus, herpes simplex, chlamydia trachomatis.
Biopsy for tumours
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Homework
1. What is WHO Grading for Trachoma?
2. How is Trachoma spread?
3. What is SAFE strategy?
4. Why is Ophthalmia neonatorum an emergency?
5. What are the risk factors for corneal disease?
6. What is the most appropriate treatment for
pterygium?