Lenses, glasses and methods for obtaining defocusing amount parameters, ophthalmic dispensing and evaluating effect

A defocus amount and lens technology, applied in the field of obtaining defocus amount parameters, evaluating the effect of myopia control, glasses, and lenses, which can solve the problems of long time, the impact of orthokeratology applications, and the lack of standards for clinical prediction of orthokeratology lenses. And other issues

Active Publication Date: 2019-04-05
天津医科大学眼科医院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are no other defocus parameters related to myopia control
Moreover, the clinical prediction of the effect of orthokeratology lenses still lacks standards, and it will take a long time to judge its myopia control effect on specific myopia patients.
This has affected the use of orthokeratology lenses

Method used

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  • Lenses, glasses and methods for obtaining defocusing amount parameters, ophthalmic dispensing and evaluating effect
  • Lenses, glasses and methods for obtaining defocusing amount parameters, ophthalmic dispensing and evaluating effect
  • Lenses, glasses and methods for obtaining defocusing amount parameters, ophthalmic dispensing and evaluating effect

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Embodiment Construction

[0035] The application describes a number of embodiments, but the description is illustrative rather than restrictive, and it will be obvious to those of ordinary skill in the art that within the scope of the embodiments described in the application, There are many more embodiments and implementations. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Except where expressly limited, any feature or element of any embodiment may be used in combination with, or substituted for, any other feature or element of any other embodiment.

[0036] This application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The disclosed embodiments, features and elements of this application can also be combined with any conventional features or elements to form unique inventive solutions as defined by the clai...

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PUM

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Abstract

The invention discloses lenses, glasses and methods for obtaining defocusing amount parameters, ophthalmic dispensing and evaluating an effect. The peripheral defocusing lens comprises a central optical zone, the central optical zone is externally provided with an annular defocusing zone, and the defocusing amount of the defocusing zone varies in the circumferential direction. At least one of a base curve zone and a reverse curve zone of the orthokeratology lens has a structural change in the circumferential direction. The method for obtaining the defocusing amount parameters comprises the steps that the defocusing amount of a plurality of sample points on a dioptric system composed of a myopic patient cornea and the lens or on a user cornea is collected, and the sample points are distributed on a plurality of direction angles in a coordinate system with the cornea center as the origin; and the defocusing amount parameters are obtained according to the defocusing amount of the multiplesample points on the cornea. The method for determining the myopia control effect of the orthokeratology on a myopia patient according to the defocusing amount parameters is further provided.

Description

technical field [0001] The present application relates to the field of myopia prevention and control, and more specifically, to a lens, glasses, a method for obtaining a defocus parameter, a method for dispensing glasses, and a method for evaluating the effect of myopia control. Background technique [0002] Myopia has become a major public health problem, and myopia has also become a major burden on society. The degree of deflection of light at the interface can be expressed by refractive power. The refractive power depends on the refractive index of the two media and the radius of curvature of the interface. Myopia is a type of refractive error. In a normal eye, both central and peripheral images are projected onto the retina. In myopia, due to the elongation of the eyeball, in the state of accommodation relaxation, the focus of parallel rays of light falls in front of the retina after being refracted by the refractive system of the eye. [0003] The development mechan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/04G02C7/06G02C7/02G02C13/00
CPCG02C7/027G02C7/044G02C7/06G02C13/005G02C2202/24
Inventor 魏瑞华王景慧杜蓓林伟平谷天瀑刘桂华
Owner 天津医科大学眼科医院
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