[Determination of the shape of the contact line for protective glasses]

A contactless stereoscopic technique of determining the fitting line form for protective glasses is described. Twin stereoscopic images of human face and head are obtained, and based on these measurements the space coordinates of fitting line points are calculated. Mean statistic curves for 3 projections of the fitting lines obtained in the course of the examination of nearly 500 industrial, office and professional workers wearing protective glasses are presented.