Method and system for determining AC value of orthokeratology lens

A technology for orthokeratology and determination methods, which is applied in the fields of eye testing equipment, medical science, diagnosis, etc. It can solve problems such as difficult quantitative description, inability to pass beginners, and inaccurate measurement

Active Publication Date: 2021-05-18
BEIJING TONGREN HOSPITAL AFFILIATED TO CAPITAL MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires long technical training for fitting personnel, and there are large differences between measurers
In particular, the thickness of the tear layer at the apex of the cornea (that is, the gap between the apex o

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  • Method and system for determining AC value of orthokeratology lens
  • Method and system for determining AC value of orthokeratology lens
  • Method and system for determining AC value of orthokeratology lens

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0037] Such as figure 1 As shown in the embodiments, the present invention provides a method for determining the AC value of orthokeratology lenses, which includes

[0038] The object of the present invention is to provide a kind of determination method of AC value of orthokeratology lens on the one hand, it comprises

[0039] S1, obtaining the parameters of the patient's cornea, the parameters including corneal flat K value, corneal e value and corneal diameter;

[0040] S2, calculating corneal sagittal height according to the paramet...

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Abstract

The invention provides a method for determining an AC value of an orthokeratology lens. The method comprises the following steps of: S1, acquiring parameters of a cornea of a patient, wherein the parameters comprise a cornea flatness K value, a cornea e value and a cornea diameter; S2, calculating a cornea rise according to the parameters acquired in the step S1; S3, matching a lens rise closest to the cornea rise in a lens database; and S4, taking the AC value of the orthokeratology lens corresponding to the lens rise as the AC value of the orthokeratology lens needing to be produced. The invention further provides a system for determining the AC value of the orthokeratology lens, which is used for realizing the method. According to the method and the system, the influence of different experiences of different optometrists on the accuracy of measurement of the AC value of the orthokeratology lens is avoided, the difficulty of lens matching is reduced, and the standardization degree of lens matching is improved.

Description

technical field [0001] The invention relates to the field of orthokeratology lenses, in particular to a method for determining the AC value of an orthokeratology lens. Background technique [0002] The prevalence of myopia among Chinese teenagers ranks first in the world, and the prevalence of high myopia is also rising. Orthokeratology contact lens (Ortho-k) is an effective means to prevent the development of myopia, and the number of fittings is increasing at a rate of 30% to 40% per year. higher demand. [0003] The matching of the relationship between corneal sagittal height, corneal apex tear layer thickness, and orthokeratology lens sagittal height is the basis for successful fitting of all types of orthokeratology lenses, and is currently mainly evaluated by fluorescent staining. This method requires long technical training for fitting personnel, and there are large differences among measurers. In particular, the thickness of the tear layer at the apex of the corne...

Claims

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Application Information

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IPC IPC(8): A61F9/013A61B3/107
CPCA61F9/013A61B3/107A61B3/0025
Inventor 甄毅王文华李倩申婧
Owner BEIJING TONGREN HOSPITAL AFFILIATED TO CAPITAL MEDICAL UNIV
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