Eye kept closed for one minute or so.
4. Reaction:
Onset in 12 to 24 hours (may begin earlier); acme in 24 to 36 hours; duration of reaction—3 to 4 days or even longer (in severe cases). Some reactions are of short duration. 3 grades of reaction, according to Citron:
1. Reddening of caruncle and palpebral (lid) conjunctiva.
2. More intense reddening, with involvement of ocular (eyeball) conjunctiva, and increased secretion.
3. Very intense reddening of the whole conjunctiva, with much fibrinous and purulent secretion, etc.
5. Time of Inspection:
12 and 24 hours after instillation; then once a day.
6. Cause of Reaction: