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Total serum IgE and total tear IgE (t-tIgE) levels according to the class of pollen-specific IgE (pollen-sIgE). The total serum IgE reference value was less than 170 IU/mL. Class 1 is false positive and ≥ 0.27 index; class 2 is ≥ 0.50 index; class 3 is ≥ 1.80 index; class 4 is ≥ 7.05 index; class 5 is 17.35 index; class 6 is 29.31 index. Classes 2 to 6 are positive
