Conjunctival inflammation in response to contact with allergens in the environment. May be a local effect alone, eg from eye drops, make-up or plants, or part of a more widespread atopic tendency eg hay-fever, asthma, eczema. Rarely, may be associated with corneal changes in vernal (seasonal) or atopic keratoconjunctivitis.
Clinical Features
Itch
Inflammation + swelling of the conjunctiva
Watering or watery discharge
Reduced vision if severe corneal involvement
Contact allergy may be unilateral; usually bilateral if underlying atopy, and may be seasonal.
Management
Avoid allergen if possible
Topical mast cell stabilisers
Topical anti-histamines
Topical steroid eye drops are sometimes used and need ophthalmic supervision
See ophthalmologist if severe, unresponsive to treatment, affecting vision or a corneal ulcer present.
