(Thanks to Israel21c) Israel’s EyeYon Medical has two solutions for corneal edema, which affects an additional two million patients every year. First, Hyper CL is a patented contact lens that uses osmosis to release fluid build-up. Then a DSPEK polymer film implant prevents the formation of fluid.
http://israel21c.org/health/eyeyons-noninvasive-answer-to-a-common-eye-problem/