A manufacturing process and the lens of oxygen permeability hard contact lens for tear circulation

摘要

PURPOSE: A method for manufacturing an oxygen supplying lens by a tear circulation and a lens for the same are provided to smoothly circulate the tears as well as to prevent the dry eye phenomena previously by forming a number of waves between the optically excavated portion and a peripheral portion. CONSTITUTION: An oxygen supplying lens by using a tear circulation includes an optically excavated portion(2), a peripheral portion(3) and a bland(4). The optically excavated portion(2) is designed in such a way that the central portion of the lens compensate the eyesight of the user. The peripheral portion(3) is formed in such a way that the curvature of thereof is larger than that of the optically excavated portion(2). And, the bland(4) is formed between the optically excavated portion(2) and the peripheral portion(3). In the oxygen supplying lens, a myriad of waves(5) are formed at the bland(4) of the contact lens(1) so as to circulate the tears from outside into the optically excavated portion(2) through the waves(5).