33 results about "Lens extraction" patented technology

An intraocular lens for use in extracapsular cataract extraction has a haptic pat that surrounds the optical pat of the lens and further contains a groove of such shape to accommodate the anterior and posterior capsules of the lens bag after anterior capsulorhexis, extracapsular cataract extraction and posterior capsulorhexis. The lens is preferably inserted in a calibrated, circular and continuous combined anterior and posterior capsulorhexis, slightly smaller than the inner circumference of the groove as to induce a stretching of the rims of the capsular openings. This new approach is believed to prevent the appearance of secondary opacification of the capsules, allows a very stable fixation of the intraocular lens and ensures a tight separation between the anterior and posterior segment of the eye. This new principle of insertion is called the bag-in-the-lens technique, in contrast with the classical lens in-the-bag technique.

Apparatus and method for the removal of lens tissue includes a first handpiece having a laser emitting probe sized for insertion into a lens capsule and radiating a lens therein. The laser emitting probe includes a lumen for introducing irrigation fluid into the lens capsule. A second handpiece includes a pulsed controlled vibrated needle for insertion into the lens capsule and emulsifying laser eradiated lens tissue. The vibrated needle includes a lumen therethrough for aspiration of emulsified lens tissue and irrigation fluid.

The present invention is directed to an apparatus and method for assisted removal of the cortex, capsule polishing and destruction and/or removal of other intraocular structures. More particularly, the present invention is directed to a surgical apparatus configurable for removal of the cortex and the polishing of the capsule during cataract extraction surgery.

An aspheric soft intraocular lens, having an optical power surface, which may have multiple radii portions or aspherical portions, as well as spherical portions, intended to replace the crystalline lens of a patient's eye, in particular after a cataract extraction. Such an aspheric soft lens is molded in a coined mold. A pair of core pins, positioned within the mold cavity during the lens forming process, will produce a pair of haptic-mounting holes within the lens. As the lenses are subsequently tumbled to remove flash, indentations will form adjacent to the haptic-mounting holes. These indentations allow for tangential attachment of the haptic to the lens which, in turn, enables maximum flexibility without exceeding the width of the optic.

The invention provides an improved process for manufacturing silicone-hydrogel contact lenses. The improvement includes use of a hot water in the step of dislodging (or removing or de-blocking) from a mold after lens being cured and before lens extraction. Hot water can be used efficiently to dislodge a hydrophobic silicone-hydrogel lens from its adhering mold half and to substantially reduce the stickiness (or tackiness) of the surfaces of the hydrophobic silicone-hydrogel lens.

The invention provides an improved process for manufacturing silicone-hydrogel contact lenses. The improvement includes use of alternative use of hot water and room-temperature or cold water to in the steps of separating a mold into a male mold half and female mold half and dislodging (or removing or de-blocking) a lens from its adhering mold half after the lens being cured and before lens extraction.

An intraocular lens, with equal conic surfaces, is intended to replace the crystalline lens in the posterior chamber of a patient's eye, in particular after a cataract extraction. The lens provides optical power to focus objects onto a patient's retina. In addition the lens surfaces are shaped to reduce optical aberrations at the retina and are tolerant to lens tilt and decentration within the eye. The lens is designed to have zero longitudinal ray aberrations at a specific ray height.

A viscoelastic agent for ophthalmic surgery is prepared by dissolving sodium hyaluronate and hydroxypropyl methylcellulose in a phosphate buffer respectively, mixing, performing filtration, sterilization, separate packaging, sampling inspection and processing. The mass content of hyaluronic acid in the viscoelastic agent is 1%-1.8%, and the mass content of hydroxypropyl methylcellulose in the viscoelastic agent is 0.2-1.0%. The medical sodium hyaluronate gel and ophthalmic hydroxypropyl methylcellulose used in the invention are two most commonly used viscoelastic agents in ophthalmic surgery of cataract extraction, intraocular lens implantation, and the like, and have been used clinically for years, and the safety and effectiveness have been validated clinically. The medical sodium hyaluronate gel has good cohesion, can support the anterior chamber of the eye well; the ophthalmic hydroxypropyl methylcellulose has good viscosity and strong adhesion, can protect ocular tissues such as cornea well; and the combination of the two can enlarge the application scope of the viscoelastic agent, and can be used in ophthalmic surgery.

The present invention is directed to an apparatus and method for assisted removal of the cortex, capsule polishing and destruction and/or removal of other intraocular structures. More particularly, the present invention is directed to a surgical apparatus configurable for removal of the cortex and the polishing of the capsule during cataract extraction surgery.

The invention relates to the technical field of medical biomaterials. Cataract treatment becomes the ophthalmic clinical attention focus and a main treatment means comprises combination of lens extraction and artificial lens implantation. At present, the main clinical problem comprises intraocular pressure increasing caused by a low anterior lens capsule tear success rate and residual of a viscoelastic agent in the eye. The invention provides the preparation method of the ophthalmological viscoelastic agent with the selective anterior capsule staining function. The preparation method comprises adding a Trypan blue staining agent with a concentration of 0.002-0.6% into a material and carrying out high temperature and high pressure sterilization. The use of the staining agent does not change viscoelastic agent gel properties and an in-vitro release rate in 60min is about 15% so that the staining agent can be continuously and slowly released to an operation part so that selective staining is realized and damage to tissue cells is prevented. Based on the characteristic, the viscoelastic agent can be effectively removed through staining agent instruction after an operation.

The invention discloses a preparation method of an anterior chamber separation saccule. The preparation method includes the steps: taking a half-compliance and/or non-compliance high-molecular material to remove dust, and placing the material into an air dry oven to perform drying; (2) placing the dried material into an extruding machine to form a pipe; (3) stretching the extruded pipe in a stretcher to form a thin-wall pipe; (4) placing the stretched thin-wall pipe into a saccule mold to perform blow molding, blowing-up a parison to cling on the inner wall of the mold, performing cooling anddemolding to obtain the saccule, and arranging a catheter on the saccule; (5) folding the saccule prepared in the step (4) by taking the catheter as a axis through a saccule folding machine to obtainthe anterior chamber separation saccule. The saccule prepared by the method is high in strength, good in durability and of an oblate spheroid structure, the diameter of the saccule is 8-9mm, the plumped height of the saccule is about 1mm, sufficient space can be reserved for an operation when phacoemulsification cataract extraction is performed, and corneal endothelial cells can be effectively protected.

The invention provides a device for preventing and treating posterior capsule opacification. The device for preventing and treating the posterior capsule opacification comprises a container, a heat insulation pipe and an elastic membrane. An outlet end is arranged on the container. A piston which is used for squeezing out contents in the container from the output end is arranged inside the container. Two ends of the heat insulation pipe are open, wherein one end is connected with the output end of the container. The heat insulation pipe is outside sealed, the elastic membrane is arranged at the other end of the heat insulation pipe, or the elastic membrane is a test-tube-shaped elastic membrane which is arranged inside the heat insulation pipe. The test-tube-shaped elastic membrane bulges out of the heat insulation pipe to form a bubble under the action of the piston, wherein trypsin is fixed on the outer surface of the bubble which is formed by the elastic membrane. The device for preventing and treating the posterior capsule opacification can selectively remove crystalline lens epithelial cells in extracapsular cataract extraction, and therefore occurring of posterior capsular opacification is avoided.

The invention relates to the technical field of 3D glasses cleaning devices, and discloses a 3D glasses cleaning device for theaters. The present invention solves the problem that when cleaning 3D glasses, many considerations are on the lens, and the frame of the glasses is not considered, and most of them are manually operated. The protruding plate extended on the left side of the cleaning device body can The glasses are placed after cleaning, and the placement box notch opened on the front of the cleaning device body can be pushed into the placement box body by matching the placement box body, and the left and right sides of the placement box notch are opened. The chute of the chute can be matched with the upper push plate to achieve the effect of pushing. The brake is performed by the push rod, which is connected to the support columns on the left and right sides on the back of the push plate, and the sleeve connected to the outer wall of the support column is matched with the upper glasses. The baffle plate can block the glasses, and the glasses are placed in the eye placement box between the two eye baffle plates, and the cleaned eyes can be taken out through the mirror opening.

The invention relates to the technical field of ophthalmic medical equipment, and particularly discloses a vitreous cutter capable of facilitating synchronous removal of intraocular foreign bodies forcataract extraction use. The vitreous cutter capable of facilitating the synchronous removal of the intraocular foreign bodies for the cataract extraction use comprises a cutter main engine; a control panel is arranged on the left side of a front end surface of the cutter main engine; rollers are arranged at all of the four corners of a lower end surface of the cutter main engine; and an adjustment column is veritically mounted on the left side of an upper end surface of the cutter main engine. The vitreous cutter capable of facilitating the synchronous removal of the intraocular foreign bodies for the cataract extraction use has the following beneficial effects: T-shaped sliding splicing is arranged between a beam and the adjustment column so as to realize stable lifting of the beam in cooperation with scale on the adjustment column, thereby clearly and directly reflecting adjusted size so as to make the vitreous cutter adapted to patients of different heights; and moreover, a fork-shaped mounting block is arranged so as to realize gathering of foreign matters and tears, thereby achieving the purpose of fixed-point processing in cooperation with the bearing effect of a bottom plate and the diversion effect of an annular groove so as to make the foreign matters and the tears gathered on the bottom plate. Therefore, the purpose of convenient and accurate experiment is achieved.

An intraocular implant for placement in the eye, e.g. as part of a cataract operation or crystalline lens extraction refractive operation, has at a peripheral portion of the implant a groove which engages with the lip of a single capsulotomy only formed in the lens capsule of the eye. The implant will normally be a lens, but may instead be a bung or plug for occluding an opening made in the capsule. The groove may be a continuous groove around the periphery of the implant, or there may be a series of individual spaced-apart grooves formed as projections protruding from the periphery. Instead of a single groove, a pair of axially spaced-apart grooves may be provided, which engage with respective capsulotomies formed in an anterior and a posterior part of the capsule. The posterior groove is preferably of a smaller mean diameter than the anterior groove

The invention provides pirenoxine sodium eye drops. According to an embodiment of the invention, the pirenoxine sodium eye drops comprise a solvent, an anti-inflammatory agent, and a solid preparation, wherein the solid preparation contains pirenoxine sodium and pharmaceutically acceptable auxiliary materials. According to the embodiment of the invention, the pirenoxine sodium eye drops contain the anti-inflammatory agent and the pirenoxine sodium at the same time, so that the pirenoxine sodium eye drops can be applied to eye administration in the initial stage after an operation of a patient, the eye infection can be effectively prevented, the incidence rate of posterior capsule opacification after the operation can be reduced, especially, the occurrence rate of posterior capsule opacification after extracapsluar cataract extraction is reduced, the curing time of eye cataract of the patient can be shortened, the pain of the patient is reduced, and the living quality of the patient is improved.

The invention relates to intraocular implant for preventing and treating lens posterior capsule opacification (after cataract), a preparation method thereof and application of Docetaxel in preparing medicines for preventing and treating lens posterior capsule opacification. The implant comprises Docetaxel and at least one kind of polymer carrier, wherein the content of Docetaxel in the preparation is 0.01 to 20 percent; and the mixture ratio of the polymer carrier to medicines ranges from 5:1-10,000:1. The preparation method comprises the following steps: evenly mixing the Docetaxel and polymer carrier monomer in proportion; adding activating substance and/or crosslinking agent and introducing nitrogen for protection; carrying out reaction at a temperature of between 50 and 100 DEG C in a die till the product takes shape; and finally, carrying out sterilization. The medicines and the polymer carrier are made into in-capsule implant and the preparation is implanted into the hollow cavity of a lens capsule after extracapsular cataract extraction to play a role in restraining proliferation of lens epithelial cell for a long time.

The present disclosure relates to the field of implantable intraocular drug delivery devices. In particular, the present disclosure relates to intraocular drug delivery devices integrated into a capsular tension ring (“CTR”) that is designed for implantation in the capsule or the ciliary sulcus during a cataract extraction and intraocular lens implantation procedure.