Patent application number | Description | Published |
20100201009 | METHODS AND SYSTEMS FOR FORMING OPHTHALMIC LENS MOLD ASSEMBLIES - Methods and systems are provided for making an ophthalmic lens. The present methods and systems are effecting in coupling two mold sections together at two or more discrete regions. Embodiments of the methods and systems form a bore that extends completely through one of the mold sections and only partially through the other mold section. During formation of the bore, the mold material in proximity to the bore being foamed becomes molten and diffuses from the bore. A portion of the molten mold material is provided at a contact point between the two mold sections and when the molten material cools, the material foams a spot weld between the mold sections. By foaming multiple hollow spot welds in a mold assembly, the two mold sections can be securely coupled to each other during the manufacture of an ophthalmic lens, such as a silicone hydrogel contact lens. | 08-12-2010 |
20100270693 | Systems and Methods for Producing Silicone Hydrogel Contact Lenses - Systems and methods for producing silicone hydrogel contact lenses are described. Certain of the present systems include a contact lens mold forming station, a station for filling a contact lens mold section with a lens precursor composition and for placing a second mold section on the filled mold section to form a contact lens mold assembly, a curing station for forming a contact lens, a mold assembly separation station, and an extraction/hydration station. Certain of the present methods include forming a plurality of mold sections, placing a lens precursor composition on a surface of a first mold section, placing a second mold section on the first mold section, polymerizing the lens precursor composition, separating the first and second mold sections, removing the silicone hydrogel contact lens from one of the mold sections, extracting extractable components from the contact lens, and hydrating the contact lens. | 10-28-2010 |
20130155372 | Ophthalmic Lens Molds, Ophthalmic Lenses Molded Therein, And Related Methods - Methods of manufacturing contact lenses using ophthalmic lens molds having a molding surface comprising a thermoplastic polymer, the molding surface having a percent polarity from 3% to 20% and a surface energy from about 25 mN/m to about 40 mN/m to cast mold a polymerizable composition having a surface tension from about 20 mN/m to about 25 mN/m, wherein a surface energy differential of the surface tension of the polymerizable composition less the surface energy of the molding surface less than or equal to zero (0); and silicone hydrogel contact lens bodies so manufactured are described. | 06-20-2013 |
20130161846 | Ophthalmic Device Molds And Related Methods - Ophthalmic device molds made from a first portion of a molding surface formed from a first polymer and a second portion of the molding surface formed from a second polymer are described. When combined, the first portion and the second portion of the molding surface form an entire molding surface suitable for molding an entire surface, such as an anterior surface or a posterior surface of an ophthalmic device. Methods of manufacturing ophthalmic devices using these molds, including contact lenses, are also described. | 06-27-2013 |
20130162942 | Polar Thermoplastic Ophthalmic Lens Molds, Ophthalmic Lenses Molded Therein, And Related Methods - Ophthalmic lens molds made from one or more thermoplastic polymers with average polarities from about 1% to about 7%, ophthalmic lenses including silicone hydrogel contact lenses molded using these less polar thermoplastic polymers, and related methods are described. When the molds are used to cast mold silicone hydrogel contact lenses, the resulting polymerized lens bodies have ophthalmically acceptably wettable surfaces. | 06-27-2013 |
20130162943 | Ophthalmic Device Molds Formed From Vinyl Alcohol Copolymer, Ophthalmic Devices Molded Therein, And Related Methods - Ophthalmic device molds made from at least one vinyl alcohol copolymer and having a static sessile drop contact angle of less than 70 degrees, ophthalmic devices such as ocular inserts and contact lenses and including silicone hydrogel devices formed using these molds, and related methods are described. The methods of manufacturing ophthalmic devices can use dry or wet demolding processes, or dry or wet delensing processes. | 06-27-2013 |
20130169926 | Ophthalmic Device Molds Formed From Highly Amorphous Vinyl Alcohol Polymer, Ophthalmic Devices Molded Therein, And Related Methods - Ophthalmic device molds made from at least one highly amorphous vinyl alcohol polymer, ophthalmic devices such as ocular inserts and contact lenses and including silicone hydrogel devices formed using these molds, and related methods are described. The methods of manufacturing ophthalmic devices can use dry or wet demolding processes, or dry or wet delensing processes. | 07-04-2013 |
20130169927 | Vinyl Alcohol Ophthalmic Lens Molds, Ophthalmic Lenses Molded Therein, And Related Methods - Ophthalmic lens molds made from at least one vinyl alcohol copolymers with high amorphous content, ophthalmic lenses including silicone hydrogel contact lenses formed using these molds, packaged ophthalmic lenses present in a solution comprising the at least one vinyl alcohol copolymer with high amorphous content, and related methods are described. The methods of manufacturing ophthalmic lenses can use wet demolding, delensing or demolding and delensing processes involving dissolving the molds in water or an aqueous solution. | 07-04-2013 |
20130176530 | Silicone Hydrogel Ophthalmic Devices Molded In Vinyl Alcohol Copolymer Molds And Related Methods - Silicone hydrogel ophthalmic devices, such as ocular inserts and contact lenses, formed in direct contact with molds comprising at least one vinyl alcohol copolymer and related methods are described. The at least one vinyl alcohol copolymer of the molds is a vinyl alcohol copolymer other than an ethylene-vinyl alcohol copolymer. The methods of manufacturing ophthalmic devices can use dry or wet demolding processes, or dry or wet delensing processes. | 07-11-2013 |
20130188125 | Ophthalmic Device Molds Formed From Water-Soluble Vinyl Alcohol Copolymer, Ophthalmic Devices Molded Therein, And Related Methods - Ophthalmic device molds made from at least one water-soluble vinyl alcohol copolymer, ophthalmic devices such as ocular inserts and contact lenses and including silicone hydrogel devices formed using these molds, packaged ophthalmic devices present in a solution comprising the at least one water-soluble vinyl alcohol copolymer, and related methods are described. The methods of manufacturing ophthalmic devices can use wet demolding processes, or wet delensing processes or both wet demolding and wet delensing processes involving dissolving the molds in water or an aqueous solution. | 07-25-2013 |
20130293831 | Ophthalmic Lens Molds With Low Levels Of UV Light Transmittance, Ophthalmic Lenses Molded Therein, And Related Methods - Ophthalmic lens molds made from one or more thermoplastic polymer having a low level of UV light transmittance (UV % T) ophthalmic lenses including silicone hydrogel contact lenses molded using these thermoplastic polymer having low UV % T, and methods of manufacturing ophthalmic lenses by cast molding a polymerizable composition in mold members formed of these thermoplastic polymers having low UV % T and curing the polymerizable composition using UV light are described. | 11-07-2013 |
20140291875 | Methods and Apparatus Useful in the Manufacture of Contact Lenses - Methods for manufacturing ophthalmic devices and apparatus for treatment of ophthalmic devices are provided. The apparatus includes a tank, liquid, baffle and ophthalmic devices. The methods include placing the liquid, baffle and ophthalmic devices in a tank including at least one element which produces bubbles and/or convection currents. The baffle is structured and/or positioned to prevent bubbles from contacting the ophthalmic devices in the tank, to reduce the force of the convection currents, or both. | 10-02-2014 |