Table 4. Total eye symptom scores for V1 and V3 at the 60-minute time point are used as base of operation to determine the improvement rate in percent. The p-value was calculated applying a t-test. „Improvement“ in the table means fewer symptoms using Respiray Wear A+ in comparison to symptom severity without a filter.

Allergen	Mean value – baseline (V1)	Mean value – with filter (V3)	Improvement rate (%)	p-value
Birch	2.48	1.35	46	0.03390
House dust mite	3.73	2.00	46	0.00519
Cat	4.00	1.66	59	0.00308