Metalens technology is now moving from proofs-of-concept toward targeted applications in smart glasses and machine vision, as its extreme thinness makes it well-suited for use cases with miniaturization demands, even if physical dispersion remains an issue for full-color imaging. The three main manufacturing technologies now in use are deep ultraviolet (DUV) lithography, laser direct writing (DLW), and nanoimprint lithography (NIL), of which MetaOptics currently leads in DLW production, while Taiwan-based players are pursuing NIL manufacturing.