Verily (formerly Google X Life Sciences) has several projects they are working on in this space, including miniaturized CGMs and glucose sensing contact lenses

Verily (formerly Google X Life Sciences) has several projects they are working on in this space, including miniaturized CGMs and glucose sensing contact lenses. https://verily.com/projects/ https://verily.com/projects/ Disclaimer: I work for Verily, but I know nothing about these projects.