Quote:
Originally Posted by Ffoont
How the heck to bifocal contacts work? Wouldn't they drift around so that the reading part was on top? |
I suspect they work like toric lenses in that they have a weight or ballast that's a little thicker than the rest of the lens and that stays on the bottom.
Either that or the magnifying (reading) part of the
contact lens is heavier anyway.
I hope that helps.