Matches 101 - 150 out of 252 < 1 2 3 4 5 6 >
Match Document Document Title
6199984 Progressive addition lenses with varying power profiles  
The invention provides lenses, as well as methods for their design and production, in which the power distribution between the distance and near vision zone substantially meets the requirements of...
6199983 Apparatus and method for manufacturing a progressive multi-focal lens  
A manufacturing method of a progressive multi-focal lens which has a progressive surface area comprising a distance portion and a near portion, which have different refractive powers, and a...
6193370 Method of manufacturing progressive power spectacle lenses  
A method of manufacturing progressive power spectacle lenses includes preparing individual fitting condition data for a lens-wearer such as object distances for near and distance vision, the...
6186626 Pair of multifocal progressive spectacle lenses  
The invention relates to a pair of progressive ophthalmic spectacle lenses; each lens has an aspherical surface with a far vision zone, an intermediate vision zone and a near vision zone, and good...
6186627 Back-surface progressive power lens  
A back-surface progressive power lens is provided having a negative dioptric power for distance vision, the value of a surface power Pf m of the progressive surface in the main meridional plane at...
6183084 Progressive addition lenses  
The present invention relates to ophthalmic lenses. In particular, the invention provides ophthalmic lenses with reduced astigmatism. The lenses are composed of a surface and a compensating...
6155681 Progressive lens  
A progressive ophthalmic lens element including a lens surface having upper viewing zone providing good optical quality at a predetermined low surface power over a large area of vision; said...
6145987 Multifocal ophthalmic lenses with spherical aberration varying with the addition and the ametropia  
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...
6142627 Short-corridor progressive lens  
A progressive ophthalmic lens designed for use in eyeglass frames having a vertical ("B") dimension <36 mm is presented. The lens features a short (nominally 13-14.5 mm) progressive corridor and...
6139148 Progressive addition lenses having regressive surfaces  
The invention provides progressive lenses with reduced unwanted astigmatism obtained by combining progressive addition and regressive surfaces. The unwanted astigmatisms of the progressive and...
6123422 Methods for producing progressive addition lenses  
The invention provides progressive addition lenses in which lens unwanted astigmatism is reduced and channel width through the intermediate and near vision zones is increased as compared to...
6116734 Ophthalmic lens  
An ophthalmic lens with an aspherical face is provided having a near vision region which is larger in size and wider than that of conventional multifocal lenses, and having reduced aberrations and,...
6102544 Multifocal ophthalmic lens  
In a multifocal ophthalmic lens comprising an aspherical surface having at every point thereon a mean sphere and a cylinder, a far vision region, a near vision region, and an intermediate vision...
6089713 Spectacle lens with spherical front side and multifocal back side and process for its production  
A spectacle lens has a spherical or rotationally symmetrical, aspheric front side and a back side prescription surface. All individual requirements of the prescription for spectacles, consisting of...
6086203 Progressive addition lenses  
The invention provides progressive addition lenses in which lens unwanted astigmatism is reduced and channel width through the intermediate and near vision zones is increased as compared to...
6074062 Progressive lens elements and methods for designing and using same  
A series of progressive ophthalmic lens elements, each lens element including a lens surface having an upper viewing zone having a surface power to achieve a refracting power corresponding to...
6074061 Progressive focal lens for eyeglasses  
A focal lens for eyeglasses includes a distance area located at an upper part of the lens, a reading area located at a lower part of the lens, and a progressive area located between the distance...
6069742 Optical apparatus and method  
In the field of eyesight correction, there is a need for "universal" spectacles that can be tailored in situ to suit an individual's requirements. The disclosure relates to an apparatus, which may...
6019470 Progressive multifocal lens and manufacturing method of eyeglass lens and progressive multifocal lens  
A progressive multifocal lens used for correction of vision includes a progressive refractive surface positioned closest to the user's eye when the lens is worn by the user, and a second surface on...
5999147 Virtual image display device  
A head-coupled display device for use in presenting electronically generated visual images to a viewer. The device includes a headpiece worn by a viewer, and an image display screen mounted in the...
5992998 Ophthalmic lens having a progressive effect  
Disclosed is an ophthalmic lens having a progressive optic power, this lens being provided with at least one surface having a surface power which changes in such a manner that, starting from at...
5984473 Method and system for adjusting progressive lenses for a patient's spectacles  
A method and a system of adjusting a progressive lens relative to the frame of a patient's spectacles. The lens has power and distortions distributions and far and near vision zones and is selected...
5949519 Multifocal ophthalmic lens  
A multifocal ophthalmic lens comprising a far vision region, a near vision region and an intermediate vision region is provided having a high near vision region and a wide vision field in the near...
5926250 Multifocal lens for eyeglass and eyeglass lens  
In a multifocal lens for eyeglass provided with visual field areas having different refractive powers, being a distance-vision area and a near-vision area, a multifocal lens for eyeglass (10) is...
5920372 Ophthalmic lens having an astigmatic effect  
An ophthalmic lens in which one surface is provided with at least one region, in which the refracting power is practically constant except for aspherical corrections, and at least one transition...
5910832 Ophthalmic no-line progressive addition lenses  
Ophthalmic no-line progressive addition lenses for spectacles are provided with increased sizes of usable intermediate and near addition zones. A preferred lens of the present invention comprises a...
5907386 Method of manufacturing a progressive optic  
A progressive optic has an optical preform wherein the radius of curvature of the surface is altered by forming discrete spherical portions across the surface. A thin intermediate layer, having a...
5892565 Progressive multifocal lens  
A progressive multifocal lens is provided with a near part N, a defined vision part F, and an intermediate part P along the main meridian curve MM'. The near center B of the lens is separated from...
5886766 Progressive multifocal lens and manufacturing method therefor  
In a process of determining the surface shape of each of progressive multifocal lenses for use as lenses in eyeglasses, radii of curvature at main points are calculated, and then the surface is...
5880810 Series for progressive spectacle lenses  
A series of progressive ophthalmic lenses, each having a varying surface power in a distance part and/or a varying increase in surface power from a distance part to a near part, includes a front...
5867246 Enhanced ophthalmic lens  
A progressive ophthalmic lens including a lens surface having: a lower viewing zone providing good optical quality at a predetermined high surface power over a large area of vision; said...
5864380 Progressive power lens  
A progressive power eyeglass lens is disclosed. The lens is particularly suitable for close-range work while facilitating distinct vision up to a specific distance that is substantially separated...
5861934 Refractive index gradient lens  
An optical product such as an optical lens, or semi-finished lens blank is provided comprising a composite of at least three different and separately applied layers, each layer having a different...
5854669 Series of lenses  
The present description refers to a series of progressive lenses, wherein the lenses present a different surface power in the distance-vision part and/or a different increase of the surface power...
5847803 Optic incorporating a power gradient  
A progressive optic has an optical preform wherein the radius of curvature of the surface is altered by forming discrete spherical portions across the surface. A thin intermediate layer, having a...
5812238 Progressive multifocal ophthalmic lens pair  
In a pair of progressive multifocal ophthalmic lenses, in which each lens has an aspherical surface comprising a far vision portion, a near vision portion, an intermediate vision portion, and a...
5805265 Progressive lens  
A progressive lens including, along a principal meridional line dividing a refracting surface of the lens into a nasal side area and a temporal side area, a far viewing portion having a surface...
5784144 Multifocal spectacle lens  
A multifocal spectacle lens has two optically effective surfaces with powers in the far reference point from -4.0 dpt to +4.0 dpt in the stronger principal section. The spectacle lens has cylinders...
5777716 Progressive power presbyopia-correcting ophthalmic lenses  
An ophthalmic lens includes a refractive surface partitioned into a first area, a second area located above the first area and a third area located below the first area. The first area includes a...
5771089 Progressive spectacle lens  
A progressive spectacle lens is described which has a convex aspherical front surface 1 and a concave aspherical back surface 2, of which at least one surface contributes to the power increase from...
5745211 Progressive power lens and eye glass lens  
A progressive power lens provides a large clear vision area from a far-distance use section to a progressive section, wherein an astigmatism imbalance during vision through both eyes is eliminated,...
5726734 Hard/soft superposition progressive lens design  
A progressive ophthalmic lens is presented which is a linear composite of a hard lens design and a soft lens design resulting in a composite lens which combines features of the visual utility of a...
5719657 Progressive power lens  
A progressive power lens whose distance viewing vertex power is a negative value and in which a surface refractive power Pf m in the main meridional plane in a distance viewing portion is larger...
5719658 Progressive multifocal ophthalmic lens  
In a progressive multifocal ophthalmic lens providing excellent performance in the far vision region, good width of the near vision region and gentle progression in the intermediate vision region...
5715032 Progressive addition power ophthalmic lens  
A progressive addition power lens having base and add spherical regions for providing refractive power correction for distance and near vision includes a central corridor characterized by a power...
5710615 Progressive power multifocal lens  
A progressive power multifocal lens designed by attaching importance to an intermediate vision and a near vision in such a manner as to ensure broad intermediate vision viewing portion and near...
5691798 Progressive power ophthalmic lens  
A progressive power ophthalmic lens having a spherical distance viewing area, a progressive power portion with a decreasing radius of curvature along an umbilic meridian, and a spherical near...
5689324 Progressive lens  
A progressive lens mold, a method of making a progressive lens mold, and progressive lenses made using such mold or method. Back faces of progressive molds are preferentially tapered at their edges...
5644374 Variable focus type eyesight correcting apparatus  
A variable focus type eyesight correcting apparatus in which a plurality of optical lenses are superimposed on each other and in which a refracting power is changed by relatively sliding the lenses...
5530491 Simultaneous vision ophthalmic lens for correcting presbyopia and pair of ophthalmic lenses of this kind for the same wearer  
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...
Matches 101 - 150 out of 252 < 1 2 3 4 5 6 >