The Occuity Indigo portable, non-contact glucose monitor is currently in the research and development phase. The device will utilize blue-light illumination to read biomarkers in the human eye to give the user an accurate blood sugar measurement. The Occuity Indigo looks like the neuralyzer from Men in Black with a concept design delivered by a former Apple designer.
https://www.notebookcheck.net/Occuity-Indigo-Pain-free-optical-non-contact-glucose-meter-in-development-that-looks-like-an-MiB-neuralyzer-and-was-designed-by-an-Apple-veteran.622815.0.html