Essilor International (compagnie Generale D'optique)

Essilor International Cie Generale D'optique

Dominique Baude

Nicolas Chateau

Jean Taboury

Pierre Chavel

Denis Joyeux

Pierre Monteil

Daniel Joseph Lougnot

Corinne Grollier

Jean-Claude Meslard

Jean-Pierre Vairon

Gerard Obrecht

Richard Legras

Florence Bouchard

Jo&euml;l Steiner

Didier Bernardet

Marine-Anne Dourges

Brigitte Marchin

Philippe Chaumont

A multifocal artificial ocular lens has at least two corrective areas, namely a near vision area to correct near vision and a distance vision area to correct distance vision. The transparency of the lens varies in inverse proportion to its illumination. A photochromic substance is incorporated into the material of the lens, which improves optical performance. Applications include central near vision contact lenses.

Multifocal artificial ocular lens with a transparency varying with illumination

This invention pertains to a process for the manufacture of a hydrophilic polymeric product, consisting in causing a material comprising a crosslinked silicone polymer matrix and photoinitiator groups dispersed and immobilized within the polymer matrix to swell in a swelling solution comprising a solvent for swelling the crosslinked silicone polymer of the matrix of the material, a photopolymerizable hydrophilic monomer and optionally a crosslinking agent and a proton- or electron-donating coinitiator compound, when the material comprises photoactivable photoinitiator groups and does not comprise proton- or electron-donating coinitiator groups causing the photopolymerizable hydrophilic monomer to diffuse into the swollen material, and polymerizing, by irradiation, the photopolymerizable hydrophilic monomer.

Material based on crosslinked silicone polymer comprising an attached photoinitiator, process for the preparation thereof, hydrophilic polymeric product obtained from this material and process for the preparation thereof, and novel photoinitiators

A multifocal ophthalmic lens is disclosed. The power profile (P) of the lens as a function of the height (h) above the axis (A) of the lens and the addition (Add) corresponding to the degree of presbyopia of the wearer is defined by an equation of the form:

Multifocal ophthalmic lenses with spherical aberration varying with the

In a method of producing tolerance markings on a contact lens for correcting astigmatism which has a given cylinder, the tolerance markings comprise at least two straight line segments in the peripheral part of the contact lens with an angle 2.alpha..sub.T between them. The angle 2.alpha..sub.T between the two straight line segments of the tolerance markings depends on the cylinder of the contact lens.

Method of producing angular tolerance markings for lenses for correcting

Multifocal artificial ocular lens with a transparency varying with

A contact lens has at least one palpebral boss projecting locally from its external surface in its peripheral area. The palpebral boss is globally elongate in a circumferential direction and the slope P of its crest line at both circumferential ends is in the range 0.020 to 0.140 and preferably in the range 0.040 to 0.080. Applications include contact lenses for centered optical correction and contact lenses for presbyopia.

Contact lens with palpebral bosses

A progressive simultaneous vision optical lens for correcting presbyopia corresponding to a low addition is of the kind in which the curve representing the proximity (or power) P lies in an area between a lower envelope curve P.sub.inf and an upper envelope curve P.sub.sup having the following polynomial equations: ##EQU1## where h is the height relative to the axis of the optical lens, i.e. the radial distance from the latter. By appropriate choice of the coefficients A'.sub.i and A'.sub.i, the near vision area is made relatively large. Applications include contact lenses, intraocular implants and intracorneal lenses.

Progressive simultaneous vision optical lens for correcting presbyopia

To define a far vision area and a near vision area in a simultaneous vision ophthalmic lens for correcting presbyopia, the curve representing the proximity as a function of the distance from the axis lies within an area between a lower envelope curve and an upper envelope curve with associated specific polynomial equations in which the coefficients depend on the proximity addition corresponding to the degree of presbyopia of the wearer. Either the far vision area or the near vision area is strengthened relative to the other, the corresponding surface areas S.sub.VL, S.sub.VP being related as follows:

Simultaneous vision ophthalmic lens for correcting presbyopia and pair

The present invention relates to a method of manufacture of an optical lens providing refractive index modulation, characterized in that, starting from a previously shaped lens of transparent hydrophilic polymer of the hydrogel type, the lens is impregnated with a photopolymerizable composition containing at least one monomer and a photoinitiator in solution in a solvent which causes swelling of the lens, the impregnated lens is subjected to irradiation which is spatially modulated in irradiation intensity and/or irradiation time, thus causing local selective polymerization of the monomer, whereupon the excess quantity of photoinitiator and non-polymerized monomer is removed by solvent extraction.

Method of fabricating a lens made of transparent polymer with modulated

Method of manufacture of a lens of transparent polymer having a

The manufacture of an artificial optical lens having any given power profile starts from an artificial optical lens having a different power profile. A physical-chemical treatment method modifies the power profile to obtain a required power profile. A rotating mask is used for spatial modulation of the energy flux.

Artificial optical lens and method of manufacturing it

Disclosed is an ophthalmic lens which characteristically comprises at least two concentric regions having diffractive components with different phase profiles in order to use different orders of diffraction. The diffractive components may be formed by holograms in relief or index holograms.

Multiple contour diffractive lens

A diffractive contact lens in relief includes a smoothing layer (50) of optically transparent material having a smooth outside surface (51) and placed over the optical surface (16) in relief so as to immerse the relief.

Diffractive contact lens in relief

The present invention relates to an optical lens for correcting astigmatism. It includes diffractive components whose outlines are delimited by conic section curves having non-degenerate centers. More precisely, in accordance with the invention, the lens includes adjacent diffractive components having hyperbolic or elliptical outlines with a periodicity in r.sup.2 in two mutually orthogonal directions x and y intersecting on the axis of the lens and coinciding with the main axes of the hyperbolas or of the ellipses, which are determined respectively by the equations: .DELTA.r.sub.x.sup.2 =2.lambda..vertline.f.sub.x .vertline.; and .DELTA.r.sub.y.sup.2 =2.lambda..vertline.f.sub.y .vertline.; in which: .DELTA.r.sub.x.sup.2 represents the periodicity in r.sup.2 along the x direction; .DELTA.r.sub.y.sup.2 represents the periodicity in r.sup.2 along the y direction; .lambda. represents the mean utilization wavelength; f.sub.x represents the desired focal length in the X direction; and f.sub.y represents the desired focal length in the Y direction.

Growing community of inventors

Saint-Ouen, France

Dominique Baude