Design method for orthokeratology lens

A technology of orthokeratology lens and design method, which is applied in glasses/goggles, optics, instruments, etc., can solve the problems of unstable tear storage space capacity, poor central positioning performance of orthokeratology lens, etc., and improve the central positioning performance , Guaranteed stability and stable storage capacity

Active Publication Date: 2018-10-19
SHENZHEN NEW IND MATERIAL OF OPHTHALMOLOGYCO
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Problems solved by technology

[0005] The main purpose of the present invention is to propose a design method for orthokeratology lenses, aiming to solve the problems of the existing design meth

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  • Design method for orthokeratology lens
  • Design method for orthokeratology lens

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses a design method for an orthokeratology lens. In the technical scheme provided by the invention, coordinates of all arc sections of the inner surface of the orthokeratology lensare obtained by establishing a corneal model formula; all the arc sections of the inner surface of the orthokeratology lens are determined by combining the relationship between cross-sectional areasand integral areas of tear films in all arc section areas and points on corresponding arc sections, so that more accurate actual shape of analogous parabola of cornea is combined in the design of theorthokeratology lens; meanwhile, by considering the setting of higher model resolution, the design has the capability of correcting refractive errors more accurately; by using the design of the tear films and controlling the cross-sectional areas and the integral areas of the tear films in all the arc section areas, storage capacity of tears is more stable, and further the stability of a shaping effect of the orthokeratology lens is ensured; meanwhile, central locating property of the orthokeratology lens can also be improved.

Description

technical field [0001] The invention relates to the technical field of orthokeratology lenses for correcting eyesight, in particular to a design method of orthokeratology lenses. Background technique [0002] Orthokeratology (Ortho-K) is a procedure that actively, step by step, gradually and scientifically changes the overall shape of the cornea through specially designed orthokeratology lenses, aiming at rapidly improving uncorrected vision and controlling the development of myopia in young people. technology. [0003] Modern orthokeratology lenses adopt the design principle of "inversion geometry", and the inner surface shape of the orthokeratology lens is designed to be opposite to the geometric shape of the front surface of the cornea, and some gaps are created between the lens and the cornea, and the mechanical action of tears is used to achieve " orthopedic effect. Orthokeratology lenses are rigid contact lenses. After wearing, there is a layer of unevenly distribute...

Claims

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Application Information

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IPC IPC(8): G02C7/02G02C7/04
CPCG02C7/024G02C7/027G02C7/028G02C7/047
Inventor 曹吉
Owner SHENZHEN NEW IND MATERIAL OF OPHTHALMOLOGYCO
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