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7368072 |
Photochromic contact lenses and methods of manufacturing
Described are contact lenses having photochromic materials within the central or pupillary area of the lens and methods for manufacturing such lenses. In one method, a photochromic amount of at...
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7326373 |
Method for forming a wafer for use in an optical part
An improved method is disclosed, for forming a wafer into a complex, curved shape, for use in an optical part. The method includes a step of moving the wafer into contact with a molding surface...
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7217375 |
Apparatus and method of fabricating a compensating element for wavefront correction using spatially localized curing of resin mixtures
An optical wavefront correction plate incorporates a unique, three-dimensional spatial retardation distribution utilizing the index of refraction change of resin mixture in its cured state. The...
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7077985 |
Injection molding of lens
A flat or curved photochromic laminate structure and a plastic photochromic lens blank can be produced in a simple and efficient manner from relatively low-cost polymeric sheet materials. These...
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6811830 |
Photochromic article and method of preparation
A process for manufacture of a photochromic polymeric article comprising: providing a fluid polymerisable composition; subjecting the fluid polymerisable composition to a first curing step to...
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6491851 |
Method for obtaining an ophthalmic lens comprising a surface utility microstructure and resulting ophthalmic lenses
The invention concerns a method for obtaining an ophthalmic lens comprising a surface utility microstructure, in in particular antiglare. The method for obtaining an ophthalmic lens comprising a...
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6433936 |
Lens of gradient dielectric constant and methods of production
Disclosed is a lens of gradient dielectric constant and methods for the production of same. The lens includes an inner core comprising a cured or fused substantially homogenous blend of glass...
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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...
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6010647 |
Multifocal lens and method of making the same
A multifocal lens having a plurality of focal points with focal positions different from each other includes a central optical portion, centered at an optical axis, having a predetermined...
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5702819 |
Composite lenses
A method for making improved optical quality lenses is described which includes arranging a mold having a molding surface, a curable optical quality resin composition, and a plastic lens preform of...
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5601759 |
Method for molding contact lenses
A method of molding a series of contact lenses having a range of optical powers using a matrix of posterior and anterior molds having varying surface characteristics such that the optical powers...
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5531940 |
Method for manufacturing photochromic lenses
Methods for making optical quality plastics lenses with photochromic additives are described. According to a first embodiment of the invention, a casting resin is containing photochromic additives...
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5512220 |
Method of making a clear axis, segmented multifocal ophthalmic lens
A method of making a multifocal refractive lens to focus light on the retina of the eye. The lens includes a plurality of segments, having different optical powers, at least one for distance vision...
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5507979 |
Method of manufacturing a segmented multifocal ophthalmic lens
A method of making multifocal refractive contact lens to focus light on the retina of the eye uses a plurality of at least two of each alternating segments having different optical powers for...
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5433898 |
Method of manufacturing a contact lens
Methods of manufacturing a contact lens form a mold which has a first section formed from a first material and a second section formed from a second material. The methods permit the facile...
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5406341 |
Toric single vision, spherical or aspheric bifocal, multifocal or progressive contact lenses and method of manufacturing
A method for making a finished aspheric single vision, spherical or aspheric bifocal, multifocal or progressive addition contact lens includes the step of fitting a patient requiring a near...
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5366668 |
Polymeric bifocal lens production process
A polymeric bifocal lens production process including the steps of selecting a single vision lens or lens blank with a convex surface, and a bifocal mould with a smaller radius of curvature;...
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5358672 |
Method for removing finished articles from glass, plastic or metallic molds
A method for demolding a molded article from a mold assembly having at least one mold with a molding surface includes the steps of: providing at least one tape segment on the molding surface of the...
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5343260 |
Composite ophthalmic lenses and their manufacture
This invention is directed to the fabrication of composite lenses consisting of a transparent thermoset polymer exhibiting an index of refraction of at least 1.58 and a thin glass element of...
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5200121 |
Method for the manufacture of contact lenses
In the process described, a limited number of shaping tools (T 1 , T 2 , . . . , T N ) having standardized parameters (for the production of the following contact lens parameters: contact lens...
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5147437 |
Invisible flat-top mold blank and method for manufacturing same
A mold blank for manufacturing eyeglass lenses containing a flat top bifocal segment. A ceramic platform is first constructed containing an optical surface having a recess corresponding to the flat...
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5141678 |
Method for forming disposable molds for producing optical quality lenses
A fast, simple and relatively inexpensive method for forming disposable molds for use in casting optical quality lenses. A method of producing a disposable mold having a casting surface is...
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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...
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4986939 |
Method for the production of cylindrically symmetric bodies with a radial gradient
In a method for the production of cylindrically symmetric bodies with given radial gradient of the material properties, for example of the refractive index, at least two rod-shaped molded bodies...
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4944584 |
Plastic multifocal point spherical lens
A plastic multifocal point spherical lens comprising a unitary structure of (A) a first synthetic resin layer having a fixed refractive index, (B) a second synthetic resin layer having a...
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4940205 |
Duplex lens
A method and apparatus for forming a laminated bifocal lens which includes forming a frontal lens component having a bifocal element in a substantially stress-free manner and bonding the frontal...
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4883548 |
Process for producing laminated ophthalmic lens
According to the present invention, a plurality of first lens elements each having specific lens optical values and a plurality of second lens elements each having specific lens optical values are...
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4873029 |
Method for manufacturing lenses
The disclosure relates to a method and apparatus for manufacturing lenses including the use of a wafer in conjunction with liquid monomer to provide a molded plastic lens. In the molding process, a...
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4859261 |
Method of making multi-focus ophthalmic lens
A method of producing multifocal ophthalmic lenses having a near vision minor lens element adhesively secured to the ocular surface of a major lens is disclosed. The ocular surface of the major...
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4846913 |
Method for making bifocal lens
Apparatus and a method of making an eyeglass lens module in which two lens components are disclosed. The first component is a conventional single vision stock lens having conventional corrections...
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4758448 |
Coated ophthalmic lenses and method for coating the same
An ophthalmic lens and a method for providing a thin coating thereon is disclosed. The coatings render the surfaces of the devices resistant to abrasion and have an SEB abrasion resistance to at...
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4666249 |
Surface-treated contact lens and method of producing
A contact lens for correction of astigmatism is formed from a single polymeric or copolymeric material. The lens has a central optical zone of greater rigidity than a surrounding non-optical zone....
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4524035 |
Method of making bifocal lens blanks
A method of making bifocal resinous lenses by providing a positioning cylinder connected to a low refractive index polymer. Cutting a convex optical surface orientated to the positioning cylinder....
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4425403 |
Coated plastic article
A coated plastic article having a good appearance, uniform dyeing and excellent surface properties comprises a shaped plastic substrate and a coating, said shaped plastic substrate comprising a...
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4279401 |
Apparatus and method for making cast ophthalmic lenses
Cast multifocal lenses are produced from ledged casting pieces molded from a master die having a molding surface made up of juxtapositioned die components each precision surfaced to a curvature and...
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4202848 |
Method of making bifocal contact lenses
A method of making bifocal contact lenses by cutting the distant power on a lathe with an off center rotation to produce a prism lens, removing the lens from the lathe, turning the lens 180°,...
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4190621 |
Method for molding optical plastic lenses of the standard and bifocal type
A bifocal lens is produced on either a previously formed blank lens, or completely in a singular casting between two molds. The bifocular lens is obtained by supporting a bifocal lower mold having...
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4095772 |
Casting apparatus for plastic lenses
A process and apparatus particularly suited for casting ophthalmic lenses from a liquid monomer such as "Cr-39". The liquid monomer and a catalyst are metered into a plastic lower mold member. A...
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3984506 |
Method of forming a composite bifocal contact lens blank
A method of forming a fused bifocal contact lens having "no jump" characteristics at all points of the segment line separating the distant vision segment or zone from the near vision zone is...
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3697629 |
METHOD AND PRODUCT OF MAKING MULTIFOCAL CONTACT LENSES AND LENS BLANKS
This specification discloses a method of making a contact lens blank including the steps of grinding a circular substrate to form a curved surface on a face thereof, forming a plastic mold with a...
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3684357 |
FUSED BIFOCAL CONTACT LENS UNIT
A fused bifocal contact lens having "no jump" characteristics at all points of the segment line separating the distant vision segment of zone from the near vision zone. The lens include...
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3649236 |
MANUFACTURE OF MULTIFOCAL OPHTHALMIC LENS MOLDS
A method of manufacture of molds for casting finished multifocal plastic ophthalmic lenses of the type wherein the corrections for the near field of vision are provided on the convex surface of the...
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3628850 |
CORRECTING LENS
A correcting lens for use in the formation of fluorescent dots on a color picture tube, which has its effective surface divided into a plurality of sections each of which consists of a flat or...
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3485556 |
MULTIFOCAL PLASTIC OPHTHALMIC LENS
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3460928 |
METHOD OF MAKING LENS MOLDS
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3454332 |
CORNEAL PLASTIC CONTACT LENS WITH COLORED PERIPHERAL ZONE
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3440306 |
PROCESS FOR MAKING AN IMPROVED BIFOCAL LENS
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3431327 |
METHOD OF MAKING A BIFOCAL CONTACT LENS WITH AN EMBEDDED METAL WEIGHT
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3405995 |
Preformed blank for multifocal lens
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3297422 |
Method of making molds for multifocal ophthalmic lenses
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