摘要:
Disclosed herein is an implantable accommodative IOL device for insertion into an eye of a patient, comprising an active region and a passive region. The active region has a first thickness and first refractive index, and the active region comprises an electrically responsive optical lens having variable optical power. The passive region is disposed at a periphery of the active region, and the passive region has a second thickness and a second refractive index. The second refractive index is different than the first refractive index. Thus, the light beams passing through the active and passive regions have a phase difference, thereby providing an extended depth of field.
摘要:
A method for adjusting a light, adjustable lens m an optical system includes providing a light adjustable lens in an optical system; providing an ultraviolet light source to generate an ultraviolet light; aid irradiating die generated ultraviolet light with a light delivery system onto the light adjustable lens with a center wavelength and with a spatial irradiance profile to change a dioptric power of the light adjustable lens by changing a refraction of the light adjustable lens in a refraction-change zone, thereby causing a wavefront sag, defined as half of a product of the change of the dioptric power and the square of a radius of the refraction-change zone, to be within 10% of its maximum over an ultraviolet spectrum.
摘要:
A lens for placement in a human eye, such as an intraocular lens, has at least some of its optical properties modified with a laser. The lens preferably contains at least 5% by weight UV absorber so commercially feasible rates of manufacture can be achieved. The laser forms modified loci in the lens where the modified loci have a different refractive index than the refractive index of the material before modification. The same laser modification technique can be used on the cornea in situ.
摘要:
The present invention is directed ophthalmic device materials and, more particularly to an intraocular lens (IOL) formed of a hydrogel material. The hydrogel material includes an acrylate polymer and a radiation resistant compound. The material typically has a relatively high refractive index and/or exhibits a desired degree of radiation protection.
摘要:
A radiation-absorbing polymeric material comprises units of a polymerizable UV-absorbing compound, a violet light-absorbing compound, and a monomer, and is capable of absorbing UV radiation, at least about 90 percent of light having wavelength of 425 nm, less than about 50 percent of light having wavelength of 450 nm, and less than about 30 percent of light having wavelength of 475 nm. Ophthalmic devices, such as contact lenses, corneal rings, corneal inlays, keratoprostheses, and intraocular lenses, are made from such polymeric material.
摘要:
A polymeric radiation-absorbing material comprises units of a polymerizable benzotriazole-based radiation-absorbing compound and a monomer, and is capable of absorbing UV radiation, at least about 90 percent of light having wavelength of 425 nm, less than about 50 percent of light having wavelength of 450 nm, and less than about 30 percent of light having wavelength of 475 nm. Ophthalmic devices, such as contact lenses, corneal rings, corneal inlays, keratoprostheses, and intraocular lenses, are made from such polymeric material.
摘要:
A polymeric radiation-absorbing material comprises units of a polymerizable benzotriazole-based radiation-absorbing compound and a monomer, and is capable of absorbing UV radiation, at least about 90 percent of light having wavelength of 425 nm, less than about 50 percent of light having wavelength of 450 nm, and less than about 30 percent of light having wavelength of 475 nm. Ophthalmic devices, such as contact lenses, corneal rings, corneal inlays, keratoprostheses, and intraocular lenses, are made from such polymeric material.
摘要:
The application is related to a method for producing silicone medical devices, in particular, silicone contact lenses, having consistent mechanical properties in a cost-effective manner. The polymerizable silicone composition comprises repeating units of a polydiorganosiloxane having at least two thiol groups. The application is also related to a soft silicone contact lens.
摘要:
The present invention describes an apparatus for adjustable optical power intra ocular lens comprising a flexible lens, flexible haptics and flexible cushions. At least one of these elements is made of a UV sensitive material that can be turned into rigid by UV radiation.