Allergic conjunctivitis

Dr. Siddharth Shah MS
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Allergic conjunctivitis

Conjunctiva 

• Modified mucous membrane that covers the inner surface of the lids and the globe to the edge of the cornea. 

• Highly vascular tissue. 

• Protects the globe.

Allergic conjunctivitis 

Allergic inflammation of the conjunctiva. 

• Etiology: • 1) transient allergen: pollen • 2) persistent allergen: house dust mite

Classification 

• Seasonal allergic conjunctivitis 

• Atopic kerato conjunctivitis 

• Vernal kerato conjunctivitis 

• Giant papillary conjunctivitis

Symptoms

• Itching (hallmark symptom) 

• Photophobia 

• Foreign body sensation 

• Tearing 

• Blepharospasm 

• Watery discharge 

• Mucoid discharge

• Red eye (bilateral conjunctival injection) 

• Chemosis 

• Periorbital swelling (lid edema) 

Types of conjunctival reaction:  Follicles Papillae & Giant papillae

Diagnostic workup 

• History: • allergic disease (asthma, eczema) • use of topical preprations • Seasonal history • Contact lenses  • Skin prick test. • Patch test. • Measurement of tear levels of inflamatory mediators (IgE, histamine).

Management

• Non specific: cold compresses, mucolytic drops. • Topical antihistamine. • Oral antihistamine. • Mast cell stabilizers. • Steroids. • Cyclosporins. • NSAID.