Conjunctiva Flashcards
Conjunctiva is fromed of
Squamous epithelium and stroma
Conjunctiva is covering the anterior of sclera and lining the eyelid
Mention the name of each part
Palpebral conjunctiva (lined the eyelid)
Bulbar
Mention some bacteriae that cause conjunctivitis
Streptococcus
Staph. Species
H.influenza
Moraxella catarrhalis
Pneumoniae
And Chlamydia (trachoma)
Patients with bacterial conjunctivitis comes with:
Red eye
Discharge (طمز)
Hx of sticky eye in morning
NB: No visual affection, No ++IOP
Lymph node involvement is rare
Mention some antibiotics that are used in the treatment of bacterial conjunctivitis
Tetracycline (not for pregnant or children under 7y)
Erythromycin
Sulphacetamide
Aminoglycosides
Gentamycin
Cyclofluxacine
In the case of conjunctivitis, it is important to invert the upper eyelid
To see the discharge
In severe bacterial infection, there is a true memebrane or pseudomembrane in the eyelid
Talk about the difference
Pseudomembrane is dryness of profuse discharge (coagulated exudate) adherent to the epithelium, and it doesn’t bleed when you try to peel it off
True Memebrane consists of coagulated exudate invades conjunctival epithelium (it bleeds)
True membrane caused by:
Beta hemolytic streptococci
Diphtheria
The difference b/w bacterial and viral conjunctivitis
In viral infection:
There is no pus (water discharge)
Corneal involvement is common
Lymph N involvement is common
There is photophobia (indicates for corneal involvement)
Common viruses that infect the conjunctiva
Adenovirus (keratoconjunctivitis)
Enterovirus 70 and coxsackievirus A24 (acute hemorrhagic conjunctivitis)
Adenovirus infection comes with:
Watering
Redness
Lid edema
Preauricular adenopathy
Subconjunctival hemorrhage
Photophobia (corneal involvement)
