PROCESS FOR PRODUCING PLASTIC LENS, FILM POSITIONING METHOD

A method of manufacturing a plastic lens according to the present invention includes: a step of putting a first curable composition over a forming surface of a first mold substrate having the forming surface for forming a lens surface; a step of spreading the first curable composition over the entire forming surface by pressing the composition with a film to form a first curable composition layer and separating the film from the first mold substrate by a predetermined distance through the formed first curable composition layer; a step of covering an outer edge of the first mold substrate, an outer edge of the film, and an outer edge of a second mold substrate having a forming surface for forming the other surface of the lens with a fastening member to support them and to place the second mold substrate so as to be opposed to the film with being spaced apart from the film by a predetermined distance; a step of injecting a second curable composition into a cavity between the film and the second mold substrate; a step of curing the first curable composition layer and the injected second curable composition to form substrate layers over both sides of the film; and a step of removing the fastening member, the first mold substrate and the second mold substrate to obtain a plastic lens.