Abstract:
A body-mountable device (110) includes a first layer, a second layer, and an electronic structure (150). The first layer may include a first topographical feature, while the second layer may include a second topographical feature. The first topographical feature and the second topographical feature may be reciprocally-shaped. The second layer may be mounted on the first layer such that the first topographical feature interfaces with the second topographical feature, thereby mechanically securing the second layer to the first layer. The electronic structure, which may include an antenna (170), a sensor (162), and an electronic device (150), may be embedded in the second layer. In an example in which the body-mountable device is an eye-mountable device, the first layer may be a posterior lens, and the second layer may be an anterior lens.
Abstract:
The invention relates to a lens (1) for vision correction, wherein the lens (1) is configured to be placed directly on the surface of an eye (2) of a person or to be implanted into an eye (2) of a person, and wherein the lens (1) further comprises: a transparent base element (10) having a back side (12) and a front side (11) facing away from the back side (12), a transparent and elastically expandable membrane (20) connected to said base element (10), wherein said membrane (20) comprises a back side (22) that faces said front side (11) of the base element (10), a ring member (30) connected to said back side (22) of the membrane (20) so that the ring member (30) defines a curvature-adjustable area (23) of the membrane (20), and wherein the lens (1) comprises a lens volume (41) adjacent said curvature-adjustable area (23) of the membrane (20), which lens volume (41) is delimited by the ring member (30), and wherein the lens (1) comprises a reservoir volume (42) adjacent a boundary area (24) of said membrane (20), wherein said two volumes (41, 42) are filled with a transparent liquid (50), and wherein said volumes (41, 42) are fluidly connected or fluidly connectable to each other such that, when the reservoir volume (42) is compressed, liquid (50) residing in the reservoir volume (42) is pressed into the lens volume (41) such that the curvature of said curvature-adjustable area (23) of the membrane (22) increases and the focal length of the lens (1) decreases. Further, the invention relates to a method for manufacturing a contact lens according to the invention.
Abstract:
A medical device including a pre-defined space such as a geometric shape or void. In one approach, the pre-defined space provides desired rigidity and more confort for a user. There is also provided an approach which enables engravings and accommodates electronics, mechanical objects, or other rigid or unique shapes to be embedded within a medical device such as a contact lens. When adapted to swellable substrates, the resulting swelled material can leave a gap around a perimeter of embbedded structure.
Abstract:
A method of adjusting the optical power of a lens includes individually exposing an interior volume within the lens to radiation to form at least one interior surface within the lens. The at least one interior surface alters the refractive index of the lens, thereby adjusting the power of the lens.
Abstract:
Method and apparatus for manufacturing a contact lens comprising: dispensing a plurality of separate portions (24) of a liquid composition onto a contact lens mold section (12, 16), each separate portion of the liquid composition having a volume of less than about 1000 nano-liters.
Abstract:
La présente invention concerne un procédé et un dispositif de fabrication d'une lentille (7, 21) de contact hybride, à partir d'une pièce composite formée d'une partie centrale rigide connectée à une partie périphérique souple (9, 23) par un matériau adhésif (10, 24), une telle pièce et une telle lentille. A partir d'un palet rigide (2) perméable à l'oxygène et d'un palet souple (3) hydrophile préalablement hydraté, on forme par collage d'un palet sur l'autre une pièce composite (1) comprenant trois couches superposées, on sèche ladite pièce composite (1) pendant un temps déterminé suffisant pour permettre la déshydratation du palet souple, puis on taille à sec par un outil d'usinage ladite pièce composite en présentant la face de la partie souple (3) hydrophile du côté de l'outil pour obtenir la lentille hybride, en ménageant une bande de dégagement (26) sur le pourtour externe (27) de la partie périphérique rigide.
Abstract:
Described herein are methods for producing silicone hydrogel lenses. The methods involve introducing into a mold a water-based lens-forming composition, curing the lens- forming composition in a mold to form the lens, and removing the lens from the mold. The lens-forming composition comprises (i) a polysiloxane-containing vinylic monomer or macromer, (ii) at least one hydrophilic vinylic monomer, (iii) a surfactant, and, and (iv) water. The surfactant is polysiloxane-containing surfactant that is free of actinically- polymerizable groups and is a copolymer having from about 10% to about 40% by weight of one or more polysiloxane segments and from about 90% to about 60% by weight hydrophilic units and/or segments. The methods permit the use of water as a solvent and reduce the need for organic solvents. Additionally, the lenses produced by the methods can have improved properties such oxygen permeability.
Abstract:
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 least one photochromic material is added to the pupillary region of a casting mold containing a polymerizable monomer that can be at least partially cured before and/or after the addition. Another method involves providing an amount of polymerizable photochromic monomer for the pupillary region and an amount of polymerizable non-photochromic monomer for the remainder of the contact lens in a casting mold. The photochromic and non-photochromic monomers can differ by their degree of polymerization, viscosity and/or density.