"Scientists have developed a tiny implant, no bigger than a pinhead, which sits inside the cornea and slightly increases its curvature, to allow the eye to focus again. The inlay is called Raindrop because it is the shape of a droplet and is made of a substance called hydrogel which is also used in contact lenses."
The chip, just 20 x 20 x 7 millimetres, is designed to last up to 16 years -- about half of a woman's reproductive lifespan -- delivering a daily dose of 30mcg of levonorgestrel, used in several hormonal contraceptives and emergency contraceptives. In the event a couple wants to conceive, the woman can use a remote control to turn the chip off, and then back on again when she needs to.