57 results about "Near vision" patented technology

The invention relates to the technical field of ophthalmology medical treatment, in particular to an excimer laser cutting parameter optimization method for presbyopia correction, which comprises the following steps: (1) collecting eye data of a patient: collecting eye structure data and vision information of the patient; (2) establishing a personalized eye model: constructing a personalized eye three-dimensional model of the patient based on the collected eye data; (3) determining an optimization objective function: comprehensively considering the correction effects of far vision, near vision and middle vision and the risk of postoperative complications, and determining the optimization objective function; and (4) constructing a cutting parameter constraint condition: setting the cutting parameter constraint condition according to the eye condition of the patient. The method aims at solving the problems that in the prior art, an excimer laser cutting parameter optimization method for presbyopia correction is insufficient in the aspects of individuation, accuracy, comprehensiveness, safety and the like.

An ophthalmic multifocal lens is presented, configured to provide distance vision and at least one other usable visual acuity. The lens comprises a translucent lens body having an optical axis and a refractive baseline, the refractive baseline extending to at least a portion of the lens body, and a diffraction grating configured to act as an optical splitter, extending concentrically in the radial direction and superimposed on at least a portion of the refractive baseline. The diffraction grating configured to act as an optical splitter is further configured to be continuous within at least a central 3 mm aperture, wherein the distance vision is provided by the -1st order diffraction, and the near vision is provided by the 2nd order diffraction.

An intelligent multifocal lens includes an optical zone. The optical zone includes a near vision zone, a transition vision zone, and a far vision zone surrounding the near vision zone and the transition vision zone. An add power of the near vision zone has a negative correlation with a radius of the near vision zone. A reduction of the power of the transition zone is in a range of 0.1 D to 0.6 D. The near vision zone and the transition vision zone have an interface therebetween, and a power of the near vision zone and a power of the transition vision zone at the interface therebetween are the same. The transition vision zone and the far vision zone have an interface therebetween, and a power of the transition vision zone and a power of the far vision zone at the interface therebetween are the same.

The invention discloses a method for designing a mixed type boundary contour line of a progressive multi-focus ophthalmic lens, and belongs to the field of design of progressive multi-focus ophthalmic lenses. The method comprises the following steps: constructing a Laplacian equation, and selecting a mixed rectangular boundary as a boundary of the Laplacian equation; two nodes with adjustable positions are arranged on the right side edge of the second rectangular boundary; solving a Laplacian equation for the second rectangle by adopting a finite element method, and carrying out interpolation to obtain a contour line numerical matrix solution of the second rectangle; and combining the contour line numerical solutions of the first rectangle, the second rectangle and the third rectangle to obtain a contour line function numerical matrix solution of the hybrid rectangular region. According to the invention, the contour line mixed type boundary design method is utilized to greatly improve the use range of the far vision area and the near vision area of the ophthalmic lens again, reduce the astigmatism area and improve the optical performance of the lens; the contour line mixed type boundary design method provided by the invention can also be applied to the personalized design aspect of progressive multi-focus spectacle lenses.

The invention discloses a synchronous vision optical lens. A circular pupil of the synchronous vision optical lens is divided into a long-distance vision sector and at least one short-distance vision sector; the long-distance vision sector is used for providing long-distance diopter required by long-distance vision; each of the close-range vision sectors is used to provide at least one close-range diopter required for mid-range or close-range vision. The remote diopter is generated by refractive optics, and the additional diopter is generated by refractive optics or diffractive optics. The short-distance diopters are higher than the long-distance diopters; and each short-distance vision sector corresponds to different short-line-of-sight diopters of a single focus. The diopters of the pupil sectors are mutually independent, so that the design requirements of vision at different distances are met, any different focal length combinations are supported, and the requirements of different visual effects of the synchronous visual intraocular lens are met. The long-distance diopter can also be generated by refraction and diffraction mixed optics, and the diffraction part of the long-distance focal power aims to reduce axial chromatic aberration.

The present invention provides an intraocular lens and related technologies, which have regions concentric with a lens center O, including at least one distance region for correcting visual acuity for distance vision and at least one near region for correcting visual acuity for near vision, wherein the power in the distance region is reduced to provide a negative vertical spherical aberration that at least partially offsets the positive vertical spherical aberration caused by the cornea, and the near region has a predetermined base power at the lens center O and adds a positive fixed power to an aspherical reference power within a predetermined radial range of a virtual aspherical lens that completely offsets the positive vertical spherical aberration caused by the cornea, and the near region has at least three sub-regions arranged radially, wherein sub-region 1 provides a positive power deviation for the positive fixed power, sub-region 2 provides an approximately zero power deviation for the positive fixed power, and sub-region 3 provides a negative power deviation for the positive fixed power.

The multifocal intraocular lens 100 includes a first arm 105, a second arm 110 and an optic 115. The lens 100 is positioned on the pupil 120 instead of the cataractous natural lens of the eye. The optic 115 of the lens 100 has three different zones, each zone is defined with different degrees as per the user's requirement. The first zone 125 provide distance vision, the second zone 130 provides intermediate vision and the third zone 135 provides near vision. The zones defined on the optic 115 are adaptable to contraction and expansion of the pupil 120 and provide clear vision in both said states of the pupil 120.

An accommodating intraocular lens (AIOL) for implantation within a capsular bag of a patient's eye comprises first and second components coupled together to define an inner fluid chamber and an outer fluid reservoir. The inner region of the AIOL provides optical power with one or more of the shaped fluid within the inner fluid chamber or the shape of the first or second com- ponents. The fluid reservoir comprises a bellows region with fold(s) extending circumferentially around an optical axis of the eye. The bellows engages the lens capsule, and a compliant fold region between inner and outer bellows portions allows the profile of the AIOL to deflect when the eye accommodates for near vision. Fluid transfers between the inner fluid chamber and the outer fluid reservoir to provide optical power changes. A third lens component coupled to the first or second component provides additional op - tical power.

An ophthalmic multifocal lens providing far, intermediate, and near vision having a light transmissive body with an optical axis and a refractive baseline extending over part of the lens body; further having a first portion coinciding with a central area of the lens body and a multifocal second portion extending concentrically radially; the second portion further comprising a symmetric multifocal diffractive grating superpositioned onto the baseline, covering a portion of the lens, its shape and resulting light intensity distribution changing with distance to optical axis, the first portion being substantially concave, connected to the ridge of the grating that is closest to the optical axis and provides a dominant optical power between intended far and intermediate powers; configured to have an energy ratio intended for far vision to energy intended for near vision being lower for predetermined aperture(s).

The invention relates to the field of optical lens design, particularly discloses a design method of a double-sided progressive multi-focus lens, and solves the technical problems that the front surface form of a traditional progressive multi-focus lens is single, and different requirements of myopia and presbyopia people on basic bending cannot be met at the same time. The method comprises the following steps: firstly, designing curved surfaces with different base bends of a far vision area and a near vision area of a front surface, then performing thickness compensation processing on the curved surfaces of the front surface, and finally, combining a traditional progressive multi-focus curved surface design rule to obtain a rear surface of the lens, so that double-sided progressive multi-focus collaborative design is realized, and the far vision area and the near vision area of the lens are enabled to adapt to different base bend requirements; and the overall visual effect is improved. The lens designed by the invention is better in optical performance and wider in adaptive crowd, and has higher practical value and market prospect.

A multi-focal ophthalmic lens using suppressed diffraction orders. A multi-focal ophthalmic lens includes an ophthalmic lens and a diffractive element. The ophthalmic lens has a base curvature corresponding to a base power. The diffractive element produces constructive interference in at least four consecutive diffraction orders corresponding to a range of vision between near vision and distance vision. The constructive interference produces a near focus point, a distance focus point, and an intermediate focus point between the near focus point and the distance focus point corresponding to the base power of the ophthalmic lens. The diffraction efficiency of at least one of the diffraction orders is suppressed to less than 10%.

The utility model relates to the technical field of intraocular lenses, in particular to a diffraction type multi-focus intraocular lens. According to the multi-focus intraocular lens capable of reducing the bad optical phenomenon, achromatism and even zero chromatic aberration are achieved by adjusting the matching degree between the refractive index of the material and the additional focal power of the diffraction perifocus, and therefore the glare occurrence rate of the diffraction type multi-focus intraocular lens is greatly reduced, and the optical quality of the diffraction type multi-focus intraocular lens is improved. Good far-near vision or far-middle-near whole-course vision is obtained after the operation, and the visual quality satisfaction degree after the operation is improved.

The invention relates to the technical field of medicinal chemistry, in particular to a 2-methyl-2-azabicyclo [3.2. 1] octane derivative which has a structure as shown in a general formula I or a general formula II or pharmaceutically acceptable salt, solvate, hydrate, isomer or prodrug of the 2-methyl-2-azabicyclo [3.2. 1] octane derivative, and a preparation method and application of the 2-methyl-2-azabicyclo [3.2. 1] octane derivative. As an acetylcholine receptor agonist, the compound shows high activity and high selectivity to M3 receptor subtypes. In-vitro experiments show that under the concentration of 40 mu M, the receptor excitation rate of the compound (such as 9a, 10a and the like) exceeds 95%, and is obviously superior to that of a positive control drug Aceclidine (48.65%). Due to the characteristic, the compound can generate a powerful pupil contraction pinhole effect by efficiently exciting an eye iris M3 receptor so as to improve near vision, and meanwhile, stimulation to ciliary muscles and related side effects are expected to be reduced due to high selectivity of the compound.

The present invention relates to a novel refractive intraocular lens (IOL) having a continuous range of view, extended depth of field (EDOF), capable of providing a continuous clear field of view for cataract patients when objects from far to near while minimizing halo and glare phenomena. The novel refractive EDOF continuous visual range artificial lens provided by the invention has the advantage that the extended focal depth can be provided, so that a patient can obtain continuous vision from a far position to a near position (35-40cm). The spherical aberration of each area on the front surface of the artificial lens is optimized, halo and glare are reduced to the maximum extent, the 60-degree refraction section of the fourth area is used for providing balanced energy distribution when the pupil diameter is large, the pupil is irrelevant to magnification distribution, and the lens magnification and the extension focal depth are not affected by the pupil size or light conditions. The partition modification of the intraocular lens can be used as a controllable switch, and the focal depth can be adjusted according to requirements, namely, the focal depth is adjusted from a far vision field to a near vision field or from the far vision field to a middle vision field.

The utility model discloses a refractive defocus lens, and relates to the field of spectacle lenses, taking myopia prevention and control as an example, by optimizing the design of a defocus area and positive refractive power of the lens, a first refractive area is arranged in the center of the lens, a second optical defocus area is arranged above the first refractive area, and a third optical defocus area is arranged below the first refractive area; additional refractive power distribution from low to high is presented in the second optical defocus region and the third optical defocus region from the upper part to the lower part of the lens; the first refractive area ensures that external light can be accurately focused on the retina of the eye after passing through the area, the additional refractive power of the third optical defocus area is higher than the refractive power of the second optical defocus area, and when an object is viewed, after reaching the retina above through the near-vision area below the lens, the refractive power more than that of the far-vision area is formed, so that the visual effect is improved. The defocus difference of the upper retina and the lower retina is generated; the regional out-of-focus design meets different out-of-focus requirements formed at the distance and the near, and good myopia control, hyperopia emmetropization and better visual experience are achieved.

The invention relates to a diffractive ocular implant with correction of far vision and magnification of near vision, characterized in particular in that it has a phase transfer curve as a function of the viewing distance (abbreviation PTF-TF) in which there is no discontinuity in the corneal plane of at least 1.3 D, advantageously greater than 1.45 D, on a depth of field between intermediate vision and near vision, i.e. between 0.5 D and 4 D for spatial frequencies from 0 to 100 cycles / mm for a pupil of at least 3 mm in diameter.

To provide an extended depth of focus (EDOF) that provides a cataract patient with continuous vision from distance to near with minimal halo and glare, and an intraocular lens (IOL) that achieves continuous vision.SOLUTION: To obtain continuous vision from a long distance to a short distance near 40-35cm by providing the extension of a focal depth. The spherical aberration of each zone of the anterior surface of the intraocular lens is optimized to minimize halo and glare. The fourth zone 60 degree segment design of the present invention provides a balanced energy distribution at large pupil diameters and makes the lens pupil independent of power distribution. The lens power and its extended depth of focus are independent of pupil size and lighting conditions. Furthermore, the change of zone of the intraocular lens can be used as a controllable switch to change the depth of focus according to the demand from far vision to near vision or from far vision to intermediate vision.SELECTED DRAWING: Figure 1

According to some embodiments, an ophthalmic surgical system for treating presbyopia includes controllable components and a computer. The controllable components include a light source for generating a light beam and a scanner for guiding the focus of the beam. The computer determines an ablation profile to remove tissue from the central and peripheral regions of the cornea of ​​the first eye in a pair of eyes. The ablation profile is designed to: remove tissue from the central region to create a protrusion to provide near vision, and remove tissue from the peripheral region to correct to emmetropia.

This invention relates to the field of lens technology, particularly to a progressive multifocal ring-focusing and defocusing converging lens, comprising: a lens matrix, a distance vision ring-focus area, a near vision ring-focus area, a progressive area, and an outer vision area. The ring-focusing and defocusing converging microstructure is as follows: in the distance vision ring-focus area corresponding to the main optical area, a single ring-shaped cylindrical convex microlens generates a defocus amount C1, which is then converged by all the ring-shaped cylindrical convex microlenses in the upper distance vision area to generate a first converged defocus amount C11. In the near vision ring-focus area, a single ring-shaped cylindrical convex microlens generates a defocus amount C2, which is then converged by all the ring-shaped cylindrical convex microlenses in the lower near vision area to generate a second converged defocus amount C11. This invention achieves a smoother change in defocus amount at mid-to-long distances, reducing visual fatigue. It solves the problem in existing technologies where some lenses exhibit unstable defocus amounts at mid-to-long distances, resulting in unstable defocus amounts even with accommodation, thereby preventing and controlling the progression of myopia in children and adolescents.

The invention relates to a support device (100) for supporting an optotype (102) for an examination of the near vision of a subject, the support device comprising: - an attachment means (110) intended to receive a near-vision test bar (15) fixed to a refractor head (12), the attachment means comprising a partly open hook (115) extending from a base (112), the hook having an inner surface provided with a bearing portion on which the near-vision test bar is adapted to bear, the bearing portion having a cross section with a broken-line shape formed by a hexagonal portion and a square portion, the hexagonal portion being intersected by the square portion such that the square portion forms a notch in the hexagonal portion; and - a support portion (130) for supporting the optotype mounted on the base of the attachment means.

An optical see-through (OST) near-eye display (NED) system, integrating ophthalmic correction for an eye of a user, comprising: a partially transmissive partially reflective lens, including: an inner surface having an inner surface radius of curvature exhibiting a first optical power, an outer surface having an outer surface varying radius of curvature exhibiting a second optical power, and at least two zones, including a near vision zone characterized by a first progressive optical power, and a distant vision zone characterized by a second progressive optical power, wherein said first optical power is configured to provide ophthalmic correction with respect to reflected said light beam image for viewing by said eye, wherein said second optical power and said first progressive power, and said second progressive optical power are configured to provide ophthalmic correction with respect to transmitted said incoming light from said outward scene for viewing by said eye.

The utility model discloses a low near vision optical typoscope. Through clinical verification of the inventor, the correction efficiency of the low near vision optical typoscope is accurately quantified, so that the near vision of a patient can be effectively improved by the'dosage '(namely parameters such as near vision-assisting focal power, total vision-assisting focal power and near vision-assisting distance) of the optical typoscope so as to support long-time near-distance reading of the patient; therefore, the life quality of the patient is improved.

1. Name of the designed product: cylindrical lens (2). 2. Use of the designed product: replaceable near vision lens for ski goggles. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view.

The utility model relates to a multifunctional piling auxiliary system, and belongs to the technical field of multifunctional piling. Comprising a far view angle camera used for monitoring the far view dynamic state of a steel pile and a pile hammer, a near view angle camera used for monitoring the near view dynamic state of the steel pile, an overlook angle camera used for monitoring the overlook dynamic state of the pile hammer and a displacement monitor used for monitoring the real-time displacement of the steel pile in the vertical direction. The far-view-angle camera, the near-view-angle camera, the overlook-angle camera and the displacement monitor are all electrically connected with the signal receiver, and the signal receiver is processed by the signal converter and then transmitted to the control device and the warning device. The states of the pile hammer and the steel pile are monitored from the far view angle, the near view angle and the overlook angle through the far view angle camera, the near view angle camera and the overlook angle camera, comprehensive visualization in the pile driving process is achieved in combination with the real-time displacement of the displacement monitor in the vertical direction, a pile hammer operator can accurately master the real-time states of the steel pile and the pile hammer, and the pile driving efficiency is improved. Therefore, corresponding reasonable operation is carried out.

The application provides a partitioned far-near vision alternating function lens, which has good inhibitory effect on far vision, oblique vision and near vision through the combination and alternating layout design of far vision and near vision lenses. Technical points are as follows: the lens body is provided with a concentric ring structure on the surface, the concentric ring structure comprises a plurality of near vision ring areas and far vision ring areas arranged in the same center, the near vision ring areas and the far vision ring areas are arranged in cross-adjacent distribution from inside to outside, the central area of the concentric ring structure has a circular central far vision area, and the remaining area of the lens body after removing the concentric ring structure and the central far vision area is a transition area. The lens body adopts a partitioned structure, the far vision areas and the near vision areas with different curvature radii are arranged in a concentric ring shape, so that the central area has good near vision inhibition and astigmatism correction effect. Meanwhile, the independent transmittance of the polarization structure and each partition makes the far vision area and the near vision area form a grating, which has good correction effect on high far vision and oblique vision.

In some embodiments of an enhanced monofocal intraocular lens (EMF IOL), the focal power of the EMF IOL is characterized by: a base focal power for distant vision that is consistent with a monofocal lens; and an additional power increasing structure for near vision, the additional power increasing structure including a central power increasing ring surrounding an optical axis of the IOL, and an axial power aperture at the optical axis of the IOL. In an embodiment, the power increasing structure is introduced by an approximate super Gaussian optical path difference, the super Gaussian having in its exponent a power greater than twice of radial coordinates. In some EMF IOLs, the optical path difference of the EMF IOLs is characterized by: a base wavefront for distant vision; and an additional power-increasing structured wavefront for near vision, the additional power-increasing structured wavefront being approximately characterized by a super Gaussian having, in its index, a power greater than twice of the radial coordinate r.

Three multifocal lenses 100, each lens including an optical zone. Each optical zone Oz includes a near vision zone 110, a transition vision zone 120, and a far vision zone 130 surrounding the near vis

To provide a spectacle lens that can assist both accommodation and convergence in near vision and reduce fatigue and stress of a wearer. [Solution] The eyeglass lens 1 is formed with a distance portion 10 located at the top of the lens for distance vision and a near portion 11 located at the bottom of the lens for near vision. The near portion 11 is provided with a depth of field extension component δ1 whose power changes to the positive side as it moves outward in the direction perpendicular to the optical axis of the lens, and a constant prismatic refractive power with a base direction on the nose side is provided to the entire surface of the lens.

The invention discloses a zero-adjustment near vision optical system and method based on dynamic far point matching, and relates to the technical field of visual optics and visual health. Through a quantitative formula F1 = F (infinity) + 1 / d, the near lens power F1 is customized for a user at a specific near working distance d, so that the eyeball adjusting load is zero when the user uses eyes at the distance. The system comprises a switchable optical lens group which is used for switching between the near correction state and the conventional foot correction far state. Meanwhile, a binocular alternate vision suppression module is integrated, and non-gazing eyes are out of focus through optical interference, so that the assembly load is eliminated. Further, the system may integrate an intelligent control unit, automatically switch optical states based on sensor data, and manage alternate suppression rhythms. According to the method, the visual state of zero adjustment load is introduced into the near-vision scene from the far-vision scene for the first time, and the problems of asthenopia and myopia progress caused by high-intensity short-distance eye use in the digital era are fundamentally solved.

A contour prism lens having a position-dependent focal power and a position-dependent horizontal prismatic power, and having a far vision reference point and a near vision reference point, characterized in that its vertical axis passes through a coordinate system of the far vision reference point, wherein the focal power at the near vision reference point exceeds the focal power at the far vision reference point and is less than 0.5 diopter; the difference between the horizontal prism degree on the vertical axis at the vertical coordinate of the near vision reference point and the horizontal prism degree at the far vision reference point is greater than 0.2 prism diopter (the substrate faces inwards); and the focal power along the profile prism lens through the horizontal cross section of the near vision reference point has a focal power platform, wherein the focal power is maintained within a wide range of 0.1 diopter within a horizontal region of at least 5 mm wide including the near vision reference point.