Novel idea! Excellent article.
If they switch out so easily with a little lift of your fingers I imagine that
they may be easily lost in a fall on the ski slopes when you lose your glasses
or take a face full of snow that dislodges one or both of the lenses but not the
frames. But it is a novel idea and an excellent solution for people that do
multiple activities and need different glasses for each activity but only want
to buy one pair for everything.