Metasurfaces are a new optical element that allows complete control over all aspects of light (phase, wavelength, intensity, and polarization) with a single, planar semiconductor layer. Comprised of subwavelength nanostructures, a single metasurface can carry out optical functions typically requiring four or more conventional refractive and/or diffractive optics, enabling new forms of sensing at a form factor and price point compatible with mass markets. This presentation will discuss metasurfaces from fundamental concepts to commercialization at Metalenz. We will discuss how metasurfaces are mass produced in the same semiconductor foundries making image sensors and electronics, moving large-scale production of optics into the foundry for the first time. We will also explore how the multi-function performance capabilities of a single metasurface in combination with the large-scale manufacturing capabilities of semiconductor foundries allow Metalenz to proliferate forms of sensing that have previously only been accessible in scientific or industrial laboratories.