Posted: Jul 30, 2011 11:26 am
by byofrcs
The handness of polarised light is reversed by the mirror so the light from behind the closed eye is e.g. L but bounces off the mirror and goes to R and so passes through the open-eye lens (which passes R) whereas the light from behind the open eye i.e. the open eye, its lashes, crowsfeet etc, goes through the open-eye lens and is now R (because that is what it passes), bounces off the mirror and turns into L which is then blocked by the R lens over the open-eye.