You thought contact lenses are to correct vision?

The UK's Daily Mail reports that thanks to advances in technology, contact lenses have been "transformed...into valuable health tools" that do more than just correct vision.
For example,

Red-tinted contact lenses have been developed to relieve the agony of migraines. They work by filtering out wavelengths of light that over-stimulate retinal receptors - lightsensitive tissues lining the inner surface of the eye - which results in head pain.

Researchers at the University of Western Ontario, Canada, have created lenses that chemically react to glucose found in tears as a means of monitoring glucose levels in diabetics.

Posted in: Contact lens, Diabetes mellitus, Technology