Method for determining an ophthalmic lens using an astigmatism prescription in far vision and near vision

摘要

Process for determining an ophthalmic lens for a user who has been prescribed astigmatism near vision and far vision, the method comprising the steps of: - choosing a lens starting and defining a current lens equal to starting lens; - optimization conditions of use, current lens; characterized in that the ophthalmic lens comprising a front face and a rear face, wherein the front face comprises a point called the fitting cross, which is on the lens to allow their positioning by an optician, because used as target for optimization astigmatism prescribed to the user in farsightedness and astigmatism prescribed user near vision, knowing that astigmatism is different near vision and far vision, and that the optimization comprises the definition of a corresponding main meridian to a set of gaze directions between the reference direction for distance vision and the reference direction for near vision and used as target a variation in the form of a continuous and regular progression of the amplitude and / or the axis of astigmatism along the main meridian.