Table 2. Positive conjunctival responses after CAC and EEC.
Data are given as mean ± standard deviation unless otherwise noted. Step
1 (EEC versus CAC) n=16. †Exposure 1: 8 out of 16 patients; ‡ exposure
2: 12 out of 16 patients had a positive response in the EEC. EEC =
environmental exposure chamber; CAC = conjunctival antigen challenge;
TOSS = Total Ocular Symptom Score; n.s. = not significant.