Wearers of Adaptive Eyewear can make their own prescriptions. The lenses are plastic bladders that change shape and corrective power with a small syringe. So far 30,000 people who may never be reached by an optician or afford conventional eyeglasses now have corrected vision. Recipients are now able to read, mend fishing nets, sew, and perform other tasks requiring good eyesight. The inventor, Oxford University professor Josh Silver, hopes his nonprofit organization can begin manufacturing and distributing up to 100 million pairs a year.