Mechanical Evaluation of Spectacle Nose Pad

Abstract

   When the relationship between the dimensions of face form and those of spectacle frames is poor, it may cause problems such as slipping frames and sore areas on the nose and behind the ears. This paper reports the results of mechanically modeling the contact conditions in the vicinity of the nose. We created a CAD model of a human head by considering the skin thickness distribution. We then performed finite element method (FEM) analysis about the contact region between the pad and the skin. As a result, the nose pad is pressed down in the nose while slanting toward the lower part of the nose gently. Furthermore, the pad is fixed by a slight upsurge by the reaction of the imposition of the skin.