2017 No https://www.sciencedirect.com/science/article/abs/pii/S1438463916305879 Norbäck, Dan Asia Observational Students Middle/Jr High (6-8) Temperature Humidity Carbon Dioxide (CO2) Dust Fungi Vision Tear film break up time Eye symptoms Mold School environment Fungal dna A total of 368 students (58%) participated and 17.4% reported weekly eye symptoms the last 3 months. The median SBUT and TBUT were 15 and 12 s, respectively. Students wearing glasses (OR 2.41, p = 0.01) and with a history of atopy (OR = 2.67; p = 0.008) had more eye symptoms. Girls had less eye symptoms than boys (OR = 0.34; p = 0.006) Indoor carbon dioxide in the classrooms was low (range 380–720 ppm), temperature was 25–30 °C and relative air humidity 70–88%. Total fungal DNA in vacuumed dust was associated with shorter SBUT (4 s shorter per 105 target copies per gram dust; p = 0.04) and NIBUT (4 s shorter per 105 target copies per gram dust; p < 0.001). Aspergillus/Penicillium DNA was associated with shorter NIBUT (5 s shorter per 105 target copies per gram dust; p = 0.01).