Method for defining one face of an ophthalmic lens, said face having a surface formed by superposing a Fresnel layer and a continuous surface referred to as the "carrier", said carrier comprising a geometric center, a first central zone and an annular peripheral zone, said carrier being axisymmetric, said Fresnel layer, the first central zone and the peripheral zone being centered on said geometric center, the first central zone being bounded by a first circular boundary, the annular peripheral zone being bounded on the one hand by a second circular boundary and on the other hand by the edge of the face, the method being implemented by computer and comprising a step of: defining a first profile of curvature for said carrier in said first central zone and a second profile of curvature for said carrier in said peripheral zone, the first profile of curvature depending on prescription constraints and the second profile of curvature depending on curvature constraints of a frame; defining a first radius for said first boundary and a second radius for said second boundary, the first radius being between 10 and 15 mm and the second radius depending on the shape of the frame and/or the temporal capacity corresponding to the distance separating the centre of the face and the edge of the lens temporal side; defining a third profile of curvature for a transitional zone of said carrier, said transitional zone being contiguous to the first central zone and to said annular peripheral zone, and defining a complete profile of curvature for the carrier, comprising said first, second and third profile of curvatures of the carrier; defining a target profile of curvature for the face, said target profile of curvature being identical in said first central zone to the first profile of curvature of the carrier; defining a continuous profile of curvature on the basis of a difference between said target profile of curvature and said complete profile of curvature of the carrier; and defining the Fresnel layer by cutting said continuous profile of curvature. defining a first profile of curvature for said carrier in said first central zone and a second profile of curvature for said carrier in said peripheral zone, the first profile of curvature depending on prescription constraints and the second profile of curvature depending on curvature constraints of a frame; defining a first radius for said first boundary and a second radius for said second boundary, the first radius being between 10 and 15 mm and the second radius depending on the shape of the frame and/or the temporal capacity corresponding to the distance separating the centre of the face and the edge of the lens temporal side; defining a third profile of curvature for a transitional zone of said carrier, said transitional zone being contiguous to the first central zone and to said annular peripheral zone, and defining a complete profile of curvature for the carrier, comprising said first, second and third profile of curvatures of the carrier; defining a target profile of curvature for the face, said target profile of curvature being identical in said first central zone to the first profile of curvature of the carrier; defining a continuous profile of curvature on the basis of a difference between said target profile of curvature and said complete profile of curvature of the carrier; and defining the Fresnel layer by cutting said continuous profile of curvature.