Abstract: The manufacturing process for UV-screening photochromism eye glasses is based on the use of polycarbonate, polymethyl methacrylate or Nylon as substrate to be mixed with spironaphthoxazine or its derivative as photochromism agent along with carrier, hindered phenol type antioxidant, silicone coupling agent, organic phosphorous stabilizer, piperidine type light stabilizer, and UV-absorbent. By mixing two of the last three ingredients and all other substances thuroughly, the mixture is frozen ground or mechanically pulverized to fine particles for injection molding to produce a long-term stable UV-screening photochromism eye glasses.