Matches 201 - 250 out of 343 < 1 2 3 4 5 6 7 >
Match Document Document Title
5214453 Progressive eccentricity multifocal contact lens and manufacturing process thereof  
A multifocal contact lens, having progressive eccentricity in an area coaxial relative to the optical center, is obtained through the lens outer surface turning on a lathe, in the optical area...
5198844 Segmented multifocal contact lens  
A multifocal refractive lens to focus light on the retina of the eye and method of making. The lens is comprised of a plurality of segments, alternating segments having different optical powers. At...
5192317 Multi focal intra-ocular lens  
The invention comprises an IOL with at least a center zone and two concentrically located ring zones arranged thereabout, the center zone having a distance power correction. The first concentric...
5178636 Tuned Fresnel lens for multifocal intraocular applications including small incision surgeries  
Vision correcting lenses utilizing the principles of both Fresnel lenses and Fresnel zone plates are disclosed. The lenses of the present invention provide multifocal vision correction, and are...
5173723 Aspheric ophthalmic accommodating lens design for intraocular lens and contact lens  
A multifocal lens configuration is disclosed having a lens body with first and second surfaces wherein at least one of the surfaces is defined three dimensionally as being rotationally...
5172143 Artificial optical lens and method of manufacturing it  
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...
5170192 Oxygen permeable bifocal contact lenses and their manufacture  
An oxygen permeable bifocal contact lens with a Dk of at least 10×10 -11 in which a distance vision portion having a refractive index of not more than 1.49 is formed as a preform in which there...
5158572 Multifocal intraocular lens  
Multifocal lenses are formed having a substantially circular central region having a first optical power, surrounded by a plurality of concentric ring regions which alternate between at least two...
5153778 Powerless field-corrective lens  
A optical lens is disclosed which is capable of correcting for imaging system characteristics such as field curvature and spherical aberration. The corrective lens comprises a single optic device...
5152787 Intraocular gradient-index lenses used in eye implantation  
The present invention relates to implants (intraocular lenses) for implantation in the human eyeball to replace the natural crystalline lens. In general, the implant includes a body which includes...
5151723 Multifocal contact lens  
The invention relates to an improved multifocal contact lens having different segments of near and far vision areas. These areas are arranged asymmetrically about a vertical and horizontal axis of...
5144483 Diffractive multifocal optical device  
A bifocal lens of the Cohen lens design utilizing phase zone plate optics and a facet depth of one-half wavelength of the design wavelength, where the primary focal points are at two orders,...
5141301 Soft bifocal contact lens  
A translational soft multi-focal contact lens includes a near-vision portion located in the upper approximate one-third of the optical zone of the lens. A thin, upper portion is formed by a...
5142411 Multifocal birefringent lens system  
A multifocal birefringent lens system is described together with applications of the lens system such as ophthalmic lenses (including those of the intraocular, contact and spectacle type) and...
5139325 Wide depth of focus power add to intraocular and contact lenses  
A lens and method of fabrication thereof for improving reading vision while maintaining normal vision wherein the diopter power of the lens varies inversely with the radius of the lens.
5129718 Multi-focal diffractive ophthalmic lenses  
An ophthalmic lens exhibiting diffractive power has a plurality of diffractive zones and smooth surfaces. The zones are arranged such that R 0 2 does not equal R 1 2 -R 0 2 where R 0 is the...
5125729 Multifocal contact lens  
The lens includes on its front face a central spherical circular area surrounded by an annular aspherical area. Optionally the lens may include a second spherical annular area surrounding the first...
5121980 Small aperture multifocal  
An optical device suitably employable in intraocular and contact lenses that employs a phase zone plate of a Cohen lens design that relies on a small number of zones to provide multifocal images.
5120120 Multifocal optical device with spurious order suppression and method for manufacture of same  
A multifocal optical device is provided for focusing light traveling parallel to an optical axis of the device. The multifocal optical device comprises a multifocal phase zone plate including at...
5117306 Diffraction bifocal with adjusted chromaticity  
A diffraction bifocal lens or lens system, comprising two profiled surfaces or interfaces or a linear combination thereof, wherein one profile provides for the bifocality of the lens and the other...
5116111 Multi-focal diffractive ophthalmic lenses  
A multifocal ophthalmic lens has diffractive power produced by a plurality of concentric zones. The zones have radii that meet the condition R 0 2 is not equal to R 1 2 -R 0 2 where R 0 is the...
5114220 Multiple contour diffractive lens  
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...
5112351 Multifocal intraocular lenses  
A multifocal intraocular lens is produced which comprises a lens body having a plurality of optical zones which comprises an aspheric optical zone between each add and base power zone thereby...
5108169 Contact lens bifocal with switch  
A bifocal contact lens which contains two optical powers and a structure which serves as a switch to determine which power is operative as the wearer looks alternatively at objects located at...
5106180 Multifocal ophthalmic lens  
An ophthalmic lens has front and rear optical surfaces, a central optical axis substantially perpendicular to the lens and comprises a plurality of concentric, contiguous circular refractive bands...
5104212 Diffractive contact lens in relief  
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...
5100226 Diffractive ophthalmic lens for correcting astigmatism  
An artificial eye lens such as a contact lens or intra-ocular lens corrects astigmatism by two sets of substantially linear parallel zones arranged to diffract light predominantly into one order at...
5100225 Contact lens having position stabilization  
Contact lenses having position stabilization are utilized in order to fix the position of the contact lens on the cornea of the eye of a person wearing the lens. For this purpose, thickened regions...
5096285 Multifocal multizone diffractive ophthalmic lenses  
Multifocal lenses for improving vision are disclosed. The lenses of the present invention use at least one diffractive zone located in a defined portion of the surface of a refractive lens to...
5089024 Multi-focal intraocular lens  
An intraocular lens, for use within the human eye, contains three concentric regions. An innermost region provides far-field vision. A middle region, surrounding the innermost region, provides...
5080472 Multifocal optical lens  
A multifocal lens useful as a contact lens or implantable as an intraocular lens which comprises at least 3 zones, the first zone comprising a polymer of a specified refractive index, the second...
5076683 Spuncast compound contact lens  
A reproducibly-made, wholly spuncast, non-truncated ballasted, compound surfaced soft contact lens and the method of making the same by spincasting a polymer forming monomer mixture.
5073021 Bifocal ophthalmic lens constructed from birefringent material  
A dual focal length ophthalmic lens is formed from a birefringent material with its fast and slow axes perpendicular to the user's visual axis. The dual focal property arises due to the differing...
5071244 Soft bifocal contact lens  
A soft bifocal contact lens has a carrier lens of soft plastic material shaped and dimensioned to an eye of a user. A central portion of the carrier lens is formed to provide distance-vision...
5066301 Variable focus lens  
A variable focus lens apparatus includes a transparent, generally circular envelope, a transparent gel having a relatively high resistance to flow encased in the envelope, and a plurality of light...
5056908 Optic zone phase channels  
An ophthalmic contact lens with a phase plate and a pure refractive portion within its optic zone. The invention embraces an ophthalmic contact lens of the Cohen lens design with a phase plate and...
5054905 Progressive intensity phase bifocal  
An ophthalmic lens including a carrier lens having an anterior and a posterior surface. A zone plate is having a plurality of zones is disposed annularly about the optical axis of the carrier lens...
5050981 Lens design method and resulting aspheric lens  
An aspheric lens for providing improved vision and a method for generating such a lens is described. The lens provides a sharp image focus while minimizing image aberrations. The method utilizes...
5044743 Corrective lens system  
A corrective lens system with selectable optical characteristics includes a lens element for placement in the optical path of a human eye ahead of the retina of the eye and a polarizer element for...
5044742 Contact lens  
A contact lens comprising a central, optically active zone and a peripheral, optically nonactive zone, the lens having an anterior surface and a posterior surface, the posterior surface being...
5024517 Monovision corneal contact lenses  
In monovision type corneal contact lenses, one or both lenses is provided with one or more auxiliary correction zones each having a focal length different from the focal length of the major portion...
5020898 Contact lens for correction of astigmatism  
A contact lens for correcting astigmatism. The front surface has a central optical zone and an outer carrier having two points of maximum thickness located at an oblique angle of about 110° to...
5019098 Sight-correcting optical component such as an intra-ocular implant or contact lens  
An optical component such as an intra-ocular implant or contact lens for correcting sight has an aspherical surface in at least the central part of at least one side. The parameters of this surface...
5017000 Multifocals using phase shifting  
This invention relates to a multifocal optical lens configuration that relies on the phenomenon of simultaneous vision whereby the eye is presented with two clear images at once. In particular this...
5009497 Contact lenses utilizing keel orientation  
The invention relates to a variety of contact lens designs which attempt to achieve a stable lens orientation by providing such contact lenses with approximately circular profiled grooves or...
5008102 Biocompatible intraocular light-screening compositions and methods of intraocular light screening  
Temporary, light-absorbing, ocularly biocompatible compositions include at least one biocompatible, light-absorbing substance in an amount sufficient to block substantially all light of desired...
4995714 Multifocal optical device with novel phase zone plate and method for making  
A diffractive multifocal optical element comprising a phase zone plate of a Cohen lens design containing rotationally symmetrical, curved repetitive patterns designed to operate at a specific...
4994080 Optical lens having at least one stenopaeic opening located in the central area thereof  
An optical lens having a transparent lens body for a human eye or mammalian eye is shown. The transparent lens body has an anterior surface and a posterior surface and has formed in the central...
4976534 Simultaneous vision optical lens for correcting presbyopia  
The proximity P of a simultaneous vision optical lens for correcting presbyopia is defined as the reciprocal of the distance D at which a light ray parallel to and at a distance h from its axis...
4971432 Bifocal contact lens  
A bifocal contact lens includes a near vision portion having a first radius curvature and a far vision portion concentric with the near vision portion and having a second radius of curvature. A...
Matches 201 - 250 out of 343 < 1 2 3 4 5 6 7 >