52 results about "Centration" patented technology

A two-part accommodating intraocular lens (IOL) device for implantation in a capsular bag of a patient's eye. The IOL device includes a primary lens assembly and a power changing lens. The primary lens assembly includes a fixed lens and a peripherally disposed centration member. The centration member has a circumferential distal edge and a first coupling surface adjacent the circumferential distal edge. The power changing lens has an enclosed, fluid- or gel-filled lens cavity and haptic system disposed peripherally of the lens cavity. The haptic system has a peripheral engaging edge configured to contact the capsular bag and a second coupling surface. The first and second coupling surfaces are in sliding contact with one another to permit movement of the power changing lens relative to the primary lens assembly and also to maintain a spaced relationship between the fixed lens and the lens cavity during radial compression of the power changing lens.

The invention is directed to an assembly comprising a haptic for fixation to, and manufacture in conjunction with, an intraocular lens to be implanted in the natural lens capsule of an eye. The haptic of the invention comprises a continuous ribbon forming an essentially oblong shape having anterior and posterior portions relative to the elliptical center of the haptic, wherein the ribbon loop includes two or more essentially congruent ribbon arches in each portion, and each ribbon arch has a natural index of curvature with an inner and outer edges. designed to expand the eye capsule and put tension on the zonules of the eye. The ribbon affixes to the lens on each side of the optic edge at a point or a series of points that provides suitable centration and stability of the optic, and to suspend the optic in the open capsular space. The material of the haptic is preferably somewhat flexible, and elastic, so as to provide a constant, positive force on the capsule throughout all phases of accommodation, thereby preserving tension of the zonules and allowing the capsule to change shape naturally. The haptic ribbons may be solid or of an open work structure to increase the amount of hydration available to the lens capsule. A secondary haptic ribbon, affixed to a plano optical plate, may be located on the posterior capsular surface and oriented so that the haptic arms extend through the capsular prime meridian to the anterior capsular surface at a 90° angle from the anterior haptic ribbons, thus providing for a capsular configuration as natural as possible, yet associated with an intraocular lens that may be inserted through an incision of less than 3 millimeters.

Intraocular implants and methods of making intraocular implants are provided. The intraocular implant can include a mask adapted to increase depth of focus. The method of making the intraocular implant can include suspending the mask along an optical axis of the intraocular implant using a centration tool.

Devices, systems, and methods perform diagnostic and/or treatment procedures on an eye using a pupilometer to determine a change in pupil size, a processor and a variable illumination source. In response to a change in pupil size as determined by the pupilometer, the processor may determine an optical light output sufficient to induce a pupillary response and mitigate the change in pupil size. The system directs the desired optical light output to the eye with the variable illumination source optionally to prevent the pupil size from exceeding certain limits so as to improve torsional tracking of markers of the eye.

A method for optimizing the performance in centration, rotation and stability of contact lenses makes use of the upper and lower eyelid geometries to maximize the lens-lid interaction for two different contact lens positions on the eye. The contact lenses are non-round lenses for maximum interaction with the eyelids.

An accommodating intraocular lens comprising a flexible body, a flexible optic which is moveable anteriorly and posteriorly relative to the lens body, and a weakened portion connecting the optic to the body. The body may have extending centration and fixation loops on its distal ends.

The invention discloses a block chain technology-based identity management system and method, and relates to the technical field of block chains. The system comprises a block chain platform, a business platform and user equipment, wherein the user equipment is connected with the business platform; the business platform is connected with one node in the block chain platform; the business platform is capable of initiating an identity transaction, signing the identity transaction and broadcasting transaction data of the identity transaction to the block chain platform; the block chain platform iscapable of adding the identity transaction to a block chain after verifying that the identity transaction is legal. The block chain technology has the characteristics of de-centration, tamper prevention, share and the like, so that other business platforms can read all the businesses related to users and related information in each business from block chains through accessing the nodes in the block chain platform, so that information share is realized and the information safety is relatively high.

An apparatus for ultrasound scanning of the eye is provided comprising a virtual center translocation mechanism that facilitates precise arcuate motion of an ultrasonic transducer to maintain focal distance from the eye and to maintain normality of the ultrasound beam with surfaces of the eye. The invention also provides a radius adjust mechanism for changing the radius of ultrasound scanning to facilitate positioning of the transducer focal point on selected surfaces of the eye. Centration optics are also provided, for aligning the ultrasound transducer with the Purkinje (or other optical or geometric) axis of a patient's eye. In addition the invention provides a hygiene barrier eyeseal for protection of the patient from disease propagation.

An accommodating intraocular lens comprising a flexible body, a flexible optic which is moveable anteriorly and posteriorly relative to the lens body, and hinged portions longitudinally connecting the optic to the body. The body may have extending centration and fixation loops on its distal ends.

An accommodating intraocular lens comprising a flexible body, a flexible optic which is moveable anteriorly and posteriorly relative to the lens body, and hinged portions longitudinally connecting the optic to the body. The body may have extending centration and fixation loops on its distal ends.

The invention discloses a nano-cellulose dispersing agent as well as a preparation method and application of the nano-cellulose dispersing agent. The nano-cellulose dispersing agent is prepared by the method comprising the following steps: fully and evenly mixing 5g of undried absolute dry softwood pulp, 78mg of TEMPO and 514mg of NaBr; triggering a reaction by introducing 30mL of 12% NaClO, and carrying out the reaction while mixing at the room temperature; controlling and stabilizing the pH value of a system to be 10.5 by NaOH; finishing the reaction until the rest NaClO in the system completely reacts; washing the reacted slurry by filtering until the pH is neutral; preparing the obtained fiber into a solution with 1% of centration, and treating the solution by a microfluidizer under the pressure of 5-25KPa to obtain transparent nano-cellulose dispersion liquid; storing the dispersion liquid in a refrigerator with the temperature of 4 DEG C. NFC is taken as the dispersing agent for dispersing two-dimensional materials BN and MoS2 as well as one-dimensional material CNT, so that the dispersing method is simple. The environment-friendly aqueous solution and dispersing agent are used, the dispersion efficiency is high, and the material can be dispersed on a large scale. The NFC is green and non-toxic, so that the NFC auxiliary dispersing material not only can be applied to an energy storing device, but also has important application prospect in the field of life sciences.

The invention discloses a PM 2.5 (particulate matter 2.5) sensor and an automatic calibration method thereof. By automatically calibrating detection results of a sensor through clean air, the error due to particulate matter accumulation is overcome and it is ensured that detection results of the sensor are highly accurate within a service cycle. A technical scheme of the invention refers to the PM 2.5 sensor, comprising a detection gas passage, a calibrating gas passage, a detection light source unit, a light receiving unit, a signal processing unit, an electromagnetic value, an electromagnetic valve unit and a detection chamber; by dividing a detection chamber intake passage into the detection gas passage and the calibrating gas passage and using outside air and filtered clean air respectively, PM 2.5 detection concentration and background concentration are obtained, thus enabling the detection centration to be calibrated with the background concentration.

Embodiments of this invention relate to systems and methods for providing anatomical flap centration for an ophthalmic laser treatment system. In one embodiment, the laser surgery system, having an imaging system and a suction ring coupled with a patient interface, captures a digital image of a subject's eye and identifies an optimum treatment placement of the corneal flap using anatomical markers as reference points.

An accommodating intraocular lens comprising a flexible body, a flexible optic which is moveable anteriorly and posteriorly relative to the lens body, and hinged portions longitudinally connecting the optic to the body. The body may have extending centration and fixation loops on its distal ends.

Asymmetric intraocular lenses (IOLs) are disclosed in which the centration of the optic and the pupil can be adjusted in order to reduce dsyphotopsia and/or the perception of dark shadows. For example, IOLs with uneven haptics are disclosed such that the center of the optic (i.e., the optical axis) is offset from a centerline of the overall device.

Provided is an operative keratometer consisting of a built-in bright LED ring light, which uniquely provides immediate direct preoperative confirmation to the ophthalmologist of the proper meridian for astigmatic cuts and the most advantageous location of cataract incisions to minimize postoperative astigmatism. Also provided are methods for using the operative keratometer device to facilitate evaluation of the amount and direction of astigmatism in a patient. Further provided is a movable fixation/centration device and methods for its use to focus the operative keratometer, particularly for treating astigmatism, permitting the ophthalmologist to qualitatively assess both the amount and direction of the astigmatism; to more accurately conduct surgery near the pupil by providing a patient fixation point that permits the ophthalmologist to more precisely control movement of the patient's eye during an ophthalmic procedure; and to provide monocular centration of the patient's eye.

A lens having at least one lens centration mark formed on a major surface of the lens is disclosed. The lens centration mark may be located at the intersection of a first axis and the major surface, where the major surface is symmetrical about the first axis such that the first axis is an axis of revolution of the surface. A method of making a lens having such lens centration mark, as well as a method for measuring the centration of a lens surface utilizing the lens centration mark, are also disclosed.

The invention provides a visual plugging evaluation device and a use method thereof. The device comprises a simulated wellbore mechanism, a simulated formation mechanism and a measuring mechanism which are sequentially connected. The simulated wellbore mechanism comprises a compressed gas source, a compressed gas pipeline and a vertically arranged slurry pipe which are sequentially connected. Thesimulated formation mechanism comprises a visual pipe and an outlet valve which are horizontally arranged and sequentially connected. The measuring mechanism is connected with the outlet valve. The visual plugging evaluation device simulates different pore formations through particle fillers with different diameters, pressurized plugging is performed by using the plugging slurry of certain centration, the plugging process and results of the plugging agent bridging in the pores are observed and the effect of the plugging formula is evaluated. According to the plugging evaluation device, the plugging process can be directly observed and monitored anytime so as to be convenient and easy to use.

The present embodiments provides improved devices, systems, and methods for affecting changes in pupil sizes before a laser eye procedure and using those images for alignment before and/or during a diagnostic and/or treatment procedure of the eye, particularly during laser eye surgery procedures. The embodiments provide methods and systems for tracking pupil position and torsional cyclorotation of a patient's eye. In one exemplary embodiment, the present embodiments provides methods and software for registering a photopic image of an eye captured by a laser device to the eye images of the patient's eye using a scotopic image and a photopic image captured simultaneously during wavefront exam.

The invention discloses a copper ion fiber prepared by a two-step method. The copper ion fiber is prepared by comprising the steps: for the first work procedure, immersing polyacrylonitrile fibers by a first conditioning fluid at the temperature being 35-75 DEG C, taking out the immersed polyacrylonitrile fibers after 0.5h, wherein the first conditioning fluid comprises cupric thiosulfate, sodium thiosulfate and sodium citrate according to the weight ratio of 1 to (0.05-0.25) to (0.06-0.09), and the centration of copper sulfate is 0.5-1.5wt%; and for the second work procedure, immersing the fibers processed by the first work procedure by using a second conditioning fluid, then carrying out heat treatment under the air stream with the temperature being 110 EDG C-230 DEG C, wherein the second conditioning fluid comprises basic dyestuff and an antibacterial agent according to the weight ratio of 1 to (0.7-1.2), and the concentration of the basic dyestuff is 0.05-0.15wt%. The invention discloses the copper ion fiber prepared by the preparation method and also discloses socks prepared from the copper ion fiber, mint fiber and bamboo fiber. Compared with the prior art, the copper ion fiber and the socks prepared by the invention have good anti-bacterial capability, and can be used for preventing undesirable odor, and people feel cool when wearing the socks.

A contact lens or pair of contact lenses may be designed such that the contact lens is circular or non-circular, planar or non planar, continuous or discontinuous, or any combination thereof to improve the fit of the contact lens on eye. This improved fit contact lens provides improved centration, improved rotation and/or translation and improved tear exchange on eye.