Marginal catarrhal ulcer

These superificial ulcers situated near the limbus are
frequently seen especially in old people.
Etiology
Marginal catarrhal ulcer is thought to be caused by a
hypersensitivity reaction to staphylococcal toxins. It
occurs in association with chronic staphylococcal
blepharoconjunctivitis. Moraxella and zzz  Haemophilus
are also known to cause such ulcers.
Clinical features
1. Patient usually presents with mild ocular irritation,
pain, photophobia and watering.

2. The ulcer is shallow, slightly infiltrated and often
multiple, usually associated with staphylococcal
conjunctivitis (Fig. 1).

Fig. 1. Marginal corneal ulcer in a patient with acute
conjunctivitis.

3. Soon vascularization occurs followed by
resolution. Recurrences are very common.
Treatment
1. A short course of topical corticosteroid drops
along with adequate antibiotic therapy often heals
the condition.
2. Adequate treatment of associated blepharitis and
chronic conjunctivitis is important to prevent
recurrences.