SDN Members don't see this ad. (About Ads) Hello. We will be doing a two-week intense dissection course soon and i am a little worried about the Formalin vapor getting absorbed by my soft 30-days contact lenses (I basically wear them for a whole month, even sleeping with them and switch to a new pair after) causing a prolonged exposure of formalin to the cornea and the eventual health risks that could be involved. As far as i know Formaldehyde and Formalin are relatively potent carcinogens i.e pregnant women wear facial masks for protection in Norway. Anyone has any experiences or valid information regarding this issue? P.S. It does make you really hungry, it would be interesting to find out the biochemical properties of this effect.