thick is 15 grams so preform weight would be slightly larger to insure full mold coverage and adequate flash about the entire lens periphery the flash serving to grip the lens for further treatment such as coatings tinting prior to its removal a typical lens capable of being fabricated by the improved method of the invention is shown in fig1 and 11 as illustrated therein the lens 30 is comprised of areas 34 and 36 area 34 is the major surface for distance viewing and minor surface 36 of the bifocal lens is formed to the curvature desired for near viewing or the reading portion of the lens typically for generally any given lens prescription manual computations using industry prescribed charts or desirably computer program calculations can be specified for identifying what conventional 34 stock 34 molds are to be retrieved from storage and used to fabricate the lens prescription by the improved method of the invention in addition preform choice and or size is identified by size of lens required and the material may be suitably specified as well or simply chosen by the patient and or his or her eye doctor etc it will be appreciated that with the improved method of the.