If you wear contact lenses which don’t get discarded every night, you probably carry a small case around, just in case they need to be stored temporarily.
If your eyes have become dry or sore, it’s a real pain to have to cart about spectacles to change into as well.
Today’s invention is a contact lens case the containers of which are held together by a springy band. Each container has a clear base which is actually a screw-in lens, matching your prescription.
If you need to remove your contacts at any time, pop them in the cases with some fluid at the bottom, reseal and then apply the pince-nez case to one’s nose for more relaxed vision.