OPHTHALMIC LENS HAVING A PROGRESSIVELY VARIABLE FOCAL POWER DETERMINED TAKING CONVERGENCE OF EYES INTO ACCOUNT

摘要

An ophthalmic lens (Q) has a progressively variable focal power, taken into account of the convergence of the eyes, wherein amount of a horizontal displacement of an umbilical meridian curve (M-M') has a relationship proportional to an additional refracting power (D) at respective positions of said horizontal displacement. IMAGE