Wow! Holy shnikeys! I didn't know that combo would cause a subconjunctural hematoma. good to know,thanks for passing this on. Everyone should know this. although it does make sense. when I was still working for Ford,& in CEP#1,we had an area where the machined pistons went through a tin plater tank while on an overhead hanger line that went down & ran through the plating tank,etc. Every so often,your eyes would start to burn,& we had an eye wash fountain here & there in the area to flush'em out with cold water. guess it applys to brewing as well.