It's not. I managed optical labs (the one hour kind) while getting my BSCpE. One thing I always used for my personal glasses for studying (the ones with an add

It's not. I managed optical labs (the one hour kind) while getting my BSCpE. One thing I always used for my personal glasses for studying (the ones with an additional +.50 diopter for helping my reading - but that is another post), is about a 5% solid brown tint on the lenses to make the paper just a little less white.