The refractive index of current eyeglass lens materials ranges from 1.498 (CR-39 plastic) to 1.74 (a specific variety of high-index plastic). So for the same prescription power and lens design, a lens made of CR-39 plastic will be the thickest lens available, and a 1.74 high-index plastic lens will be the thinnest.
Principal photography on the film began on April 25, 2016, in Pittsburgh, Pennsylvania, in the Hill District, and wrapped in mid-June 2016. Fences was released in the United States on December 16, 2016, by Paramount Pictures, received positive reviews and grossed $64 million.
âPower Rangersâ Movie Pushed Back to 2017. Dave McNary. Lionsgateâs âPower Rangersâ movie has been moved back six months to Jan. 13, 2017, from its original release date of July 22, 2016. Lionsgate and Saban Brands announced the âPower Rangersâ project in May.