Abstract: The present invention relates to a diffractive ocular implant with correct distance vision and enlarged near vision, which is charaterised, in particular, in that it has a phase-transfer curve as a function of thte viewing distance (abbreviated as PTFF-TF) with an absence of discontinuity over a depth of field of at least 1.3D in corneal plane, advantageously greater than 1.45D, said absence of discontinuity being located between intermediate vision and near vision, i.e. between 0.5D and 4D for spatial frequencies from 0 to 100 cycles/mm, for a pupil with a diameter of at least 3 mm.

Abstract: An assembly comprising a pair of multifocal ocular implants, wherein each implant has a TFMTF curve, for a pupil of diameter less than or equal to 4 mm, preferably less than 3 mm, having a peak corresponding to the distance vision of the wearer, as well as an asymmetrical peak which spreads between intermediate vision and near vision without discontinuity; for a first implant, the TFMTF value is greater in intermediate vision than that of near vision; for the second implant, the TFMTF value is greater in near vision than that of intermediate vision; the rising edge of the asymmetrical peak of the first implant has, as an absolute value, a mean slope greater than that of its falling edge, whereas the rising edge of the asymmetrical peak of the second implant has, as an absolute value, a mean slope less than that of its falling edge.

Abstract: An assembly comprising a pair of multifocal ocular implants, wherein each implant has a TFMTF curve, for a pupil of diameter less than or equal to 4 mm, preferably less than 3 mm, having a peak corresponding to the distance vision of the wearer, as well as an asymmetrical peak which spreads between intermediate vision and near vision without discontinuity; for a first implant, the TFMTF value is greater in intermediate vision than that of near vision; for the second implant, the TFMTF value is greater in near vision than that of intermediate vision; the rising edge of the asymmetrical peak of the first implant has, as an absolute value, a mean slope greater than that of its falling edge, whereas the rising edge of the asymmetrical peak of the second implant has, as an absolute value, a mean slope less than that of its falling edge.

Abstract: The invention relates to an intracorneal diffractive lens having phase inversion, said intracorneal diffractive lens including: a core (2) having a first surface and a second surface opposite the first surface; at least one first hydrogel layer (5) extending over the first surface of the core; and a second hydrogel layer (6) extending over the second surface of the core. The first hydrogel layer (5) includes, on the surface thereof turned toward the core, a plurality of concentrically or coaxially projecting annular areas (7), each annular area (7) having a continuously varying thickness toward the periphery of the lens. The first and second layers (5, 6) have a nutrient and oxygen permeability substantially identical to that of the corneal tissue, and at least one of the annular areas (7) of the first layer (5) is in contact with the second hydrogel layer (6).