Treat if severe, as most viral or self-limiting.

Bacterial conjunctivitis is usually unilateral and also self-limiting; it is characterised by red eye with mucopurulent, not watery, discharge; 65% resolve on placebo by day five.

Fusidic acid has less Gram-negative activity.

If severechloramphenicol 0.5% drop and 1% ointment

 2 hourly for 2 days then 4 hourly (whilst awake) at night



for 48 hours after resolution

Second line: fusidic acid 1% gel

Two times a day