15 results about "Emmetropia" patented technology

Systems and methods for intraocular lens (IOL) selection using emmetropia zone prediction include determining pre-operative measurements of an eye, estimating a post-operative anterior chamber depth (ACD) of an intraocular lens based on the pre-operative measurements, estimating a post-operative manifest refraction in spherical equivalent (MRSE) of the eye with the IOL implanted based on the pre-operative measurements and the estimated post-operative ACD, determining whether the eye with the IOL implanted is likely to be in an emmetropia zone based on the estimated post-operative MRSE, re-estimating the post-operative MRSE of the eye with the IOL implanted using an emmetropia zone prediction model or a non-emmetropia zone prediction model based on the emmetropia zone determining, and providing the re-estimated post-operative MRSE to a user to aid in selection of an IOL for implantation in the eye.

Spectacle lens design data for manufacturing spectacle lenses related to a wearer is provided. The eyeglass lens has a refractive power and at least a partial diffractive additional power, and is provided with a central region having a first diffractive additional power and being adapted to effect emmetropia of the wearer. The spectacle lens is further provided with a peripheral region disposed radially outward of the central region, where the peripheral region has a second diffractive additional power and is adapted to provide a focus in at least one of a front of the wearer's retina or a rear of the wearer's retina. The spectacle lens design data is adjusted such that the spectacle lens further has a first transition region arranged between the central region and the peripheral region, where the first transition region is adapted to adjust a diffraction efficiency from a first diffraction additional power to a second diffraction additional power in a radially outward direction. The spectacle lens has a uniform refractive power extending over at least a central region, a peripheral region, and a first transition region. The uniform refractive power is adjusted to provide focus in front of the retina of the wearer. The central region has a negative diffractive additional power such that a combination of the uniform refractive power and the negative diffractive additional power in the central region is adjusted to achieve emmetropia of the wearer.

According to certain embodiments, an ophthalmic surgical system for treating presbyopia comprises controllable components and a computer. The controllable components comprise a light source that generates a light beam and a scanner that directs a focal point of the light beam. The computer determines an ablation profile to remove tissue from a central region and a peripheral region of a cornea of a first eye of a pair of eyes. The ablation profile is designed to remove tissue from the central region to yield a protrusion to provide for near-vision, and to remove tissue from the peripheral region to correct to emmetropia.

To provide a monitoring method for an eyeball emmetropization process.SOLUTION: The method includes the following steps: acquiring eyeball data information about an eyeball to be monitored; outputting retinal optical characteristic data information about the eyeball to be monitored on the basis of the eyeball data information about the eyeball to be monitored and reference eyeball data information; and analyzing and processing the retinal optical characteristic data information about the eyeball to be monitored, and outputting, for the eyeball to be monitored, an equation representing individual emmetropization characteristics as well as related parameters. Through the present application scheme, the refractive development status of children or adolescents whose ocular refractive system is in a developmental period is monitored, and, when any abnormal tendency is detected, attention is promptly given so as to control the progression of emmetropization of the eye within a normal range. For children or adolescents in whom refractive error of the eye already exists, the degree of the refractive error and its progression are monitored and analyzed, and a future tendency of emmetropization of the eye and a future change amount of axial length are predicted.SELECTED DRAWING: None

The application provides a single-ring micro-step continuous defocus mirror and a design method thereof. The single-ring micro-step continuous defocus mirror comprises a central micro-defocus emmetropia area, a progressive defocus area and an edge arc area. The central micro-defocus emmetropia area and the progressive defocus area are both near-vision defocus curved surfaces, and the edge arc area is a far-vision defocus curved surface. A single-ring micro-step fault is connected between the progressive defocus area and the central micro-defocus emmetropia area, and the single-ring micro-step fault has a Hermite interpolation optimized micro-step elevation at a curved surface joint of the progressive defocus area and the central micro-defocus emmetropia area. The curved surface of the progressive defocus area and the edge arc area and the joint thereof have a continuous first derivative. The single-ring micro-step fault and the adjacent curved surface joint are provided with the Hermite interpolation optimized micro-step elevation, the entrance pupil defocus amount and the smoothness of the arc segment joint are increased, the joint of the progressive defocus area and the edge arc area has a continuous first derivative, high-frequency noise caused by stray light is eliminated, the imaging quality is high, the wearing is comfortable, the myopia prevention and control effect is good, and the single-ring micro-step continuous defocus mirror can be applied to contact lenses.

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 disclosure describes in-plane switching mode liquid crystal geometric phase tunable lenses that can be integrated into an eyepiece of an optical device for the correction of non-emmetropic vision, such as in an augmented reality display system. The eyepiece can include an integrated, field-configurable optic arranged with respect to a waveguide used to project digital imagery to the user, the optic being capable of providing a tunable Rx for the user including variable spherical refractive power (SPH), cylinder refractive power, and cylinder axis values. In certain configuration, each tunable eyepiece includes two variable compound lenses: one on the user-side of the waveguide with variable SPH, cylinder power, and axis values; and a second on the world side of the waveguide with variable SPH.

The application relates to the field of ophthalmology and provides a method for converting curvature eye axis into equivalent spherical lens, which comprises the following steps: detecting the value of corneal curvature K through a corneal curvature instrument; detecting the value of eye axis AL through an eye axis measuring instrument; finding a reference line a at the eye axis rate ratio reference scale of a conversion mechanism according to the age of a detector; finding the value b of the eye axis AL on an eye axis calibration scale, moving a first mark part on an eye axis curvature calculation scale to the value b, and reading the value c of the eye axis curvature calculation scale at the value a; finding the value c on a curvature calibration scale, moving the value c on the curvature calibration scale to the reference line a; finding the value d of the corneal curvature K on the curvature calibration scale, moving a second mark part to the value d; and reading the value SE of the reference line a on an SE calibration scale. The application combines the axis rate ratio (AL / CR) reference value of emmetropia people of different ages to quickly convert the method of equivalent spherical lens. The application solves the technical problem of time-consuming and labor-consuming in obtaining accurate equivalent spherical lens when establishing a student refractive development file.

A method for monitoring the progress of emmetropia is provided. The solution includes: acquiring ocular data information of the eye to be monitored; outputting retinal optical characteristic data information of the eye to be monitored based on the ocular data information of the eye to be monitored and the retinal optical characteristic data information; performing analysis on the retinal optical characteristic data information of the eye to be monitored, and outputting an equation and related parameters representing the emmetropization characteristics of the individual eye to be monitored. Through this solution, the refractive development status of children or adolescents whose ocular refractive systems are in the developmental stage is monitored, and any abnormal trends are detected and promptly addressed, thereby controlling the emmetropization progression of the eyes within a normal range; monitoring and analyzing the degree and progress of ocular refractive errors for children or adolescents who already have ocular refractive errors, and predicting the future trend of emmetropization and the amount of change in axial length over time.

According to certain embodiments, an ophthalmic surgical system for treating presbyopia comprises controllable components and a computer. The controllable components comprise a light source that generates a light beam and a scanner that directs a focal point of the light beam. The computer determines an ablation profile to remove tissue from a central region and a peripheral region of a cornea of a first eye of a pair of eyes. The ablation profile is designed to remove tissue from the central region to yield a protrusion to provide for near-vision, and to remove tissue from the peripheral region to correct to emmetropia.

In certain embodiments, an ophthalmic surgical system for creating a lenticule in the cornea of an eye comprises controllable components (including a laser source and a scanner) and a computer. The laser source generates a laser beam, and the scanner directs the focal point of the laser beam. The computer determines a lenticule design for the lenticule having a posterior side and an anterior side. Either the posterior side or the anterior side has a central portion and a peripheral portion. The lenticule design is formed using a major lenslet and a minor lenslet, where the major lenslet is designed to correct to emmetropia. The lenticule design is formed by subtracting the minor lenslet from the major lenslet, where the subtraction of the minor lenslet yields the central portion. The computer instructs one or more of the controllable components to create the lenticule.

In certain embodiments, an ophthalmic surgical system for creating a lenticule in a cornea of an eye includes controllable components (including a laser source and a scanner) and a computer. The laser source generates a laser beam, and the scanner directs a focal point of the laser beam. The computer determines a lenticule design for a lenticule having a posterior side and an anterior side. The anterior side or the posterior side has a central portion and a peripheral portion. The lenticule design is formed using a primary lenslet and a secondary lenslet, where the primary lenslet is designed to correct for emmetropia. The lenticule design is formed by subtracting the secondary lenslet from the primary lenslet, where subtracting the secondary lenslet creates the central portion. The computer instructs one or more of the controllable components to create the lenticule.

An eyeglass lens is provided that includes a clear zone arranged at the center of the eyeglass lens, the clear zone having an optical power adjusted to provide emmetropia, and a refractive power zone having a refractive power that provides an optical power that deviates from the optical power of the clear zone. The eyeglass lens further includes an annular diffractive power zone having a diffractive add power that provides an optical power that deviates from the optical power of the clear zone, wherein the refractive power zone is arranged radially outward of the diffractive power zone.

In certain embodiments, an ophthalmic surgical system for creating a lenticule in the cornea of an eye comprises controllable components (including a laser source and a scanner) and a computer. The laser source generates a laser beam, and the scanner directs the focal point of the laser beam. The computer determines a lenticule design for the lenticule having a posterior side and an anterior side. Either the posterior side or the anterior side has a central portion and a peripheral portion. The lenticule design is formed using a major lenslet and a minor lenslet, where the major lenslet is designed to correct to emmetropia. The lenticule design is formed by subtracting the minor lenslet from the major lenslet, where the subtraction of the minor lenslet yields the central portion. The computer instructs one or more of the controllable components to create the lenticule.