Table 5

Prevalence of across-shift decrements in vision by total amine concentration

Full shift total amine concentrations (mg/m3)nDecreased bilateral visual acuityDecreased bilateral contrast sensitivity at 2.5% contrastDecreased bilateral contrast sensitivity at 1.25% contrast
0.84–7.30262 (8%) 1 (4%)9 (35%)
7.31–13.80577 (12%)11 (19%)19 (33%)
13.81–20.33136 (46%) 8 (62%)6 (46%)