Search

CN-121978848-A - Cornea shaping mirror designed by myopia prevention and control ring

CN121978848ACN 121978848 ACN121978848 ACN 121978848ACN-121978848-A

Abstract

The invention provides a cornea shaping lens designed by a myopia prevention and control ring, which is used for redesigning the cornea shaping lens designed by a conventional four-radian myopia prevention and control ring, and a specially designed radian structure is added in or near a central optical area so as to be convenient for judging whether the central optical area can achieve an ideal adaptation state of flattening cornea. The cornea shaping lens is technically characterized by comprising a lens body, wherein the lens body is of an arc-shaped sheet structure with a circular outline, the inner surface of the lens body is concave, the outer surface of the lens body is convex, the lens body comprises a base arc area, a reverse arc area, a positioning arc area, a peripheral arc area and a shaping area adjusting arc, the base arc area is a circular area positioned in the center of the lens body, the reverse arc area, the positioning arc area and the peripheral arc area are sequentially and outwards arranged in concentric rings from the base arc area, and at least one shaping area adjusting arc is arranged in the base arc area and concentric with the base arc area.

Inventors

  • MAO XINJIE
  • LIU XINTING
  • CHEN MINFENG

Assignees

  • 温州医科大学附属眼视光医院

Dates

Publication Date
20260505
Application Date
20250611

Claims (8)

  1. 1. A cornea shaping lens designed by a myopia prevention and control ring is characterized by comprising a lens main body (1), wherein the lens main body (1) is of an arc-shaped sheet structure with a circular outline, the inner surface (11) of the lens main body (1) is a concave surface, the outer surface (10) of the lens main body (1) is a convex surface, the lens main body (1) comprises a base arc area (2), a reverse arc area (3), a positioning arc area (4), a peripheral arc area (5) and a shaping area adjusting arc (6), the base arc area (2) is a circular area positioned in the center of the lens main body (1), the reverse arc area (3), the positioning arc area (4) and the peripheral arc area (5) are sequentially arranged outwards in a concentric ring mode from the base arc area (2), and at least one shaping area adjusting arc (6) is arranged in the base arc area (2) and concentric with the base arc area (2).
  2. 2. The cornea shaping lens designed by the myopia prevention and control ring according to claim 1, wherein the distance from the adjusting arc (6) of the shaping area to the center of the base arc area (2) is defined as d, and the range of d is 2.5 mm-3.5 mm.
  3. 3. The cornea shaping lens designed by the myopia prevention and control ring according to claim 1 or 2, wherein the width of the shaping area adjusting arc (6) is 0.5+/-0.3 mm, the longitudinal section of the shaping area adjusting arc (6) forms an arc profile, and the formed arc profile is an arc of no more than or 1/2 circle.
  4. 4. A cornea shaping lens designed by a myopia prevention and control ring according to claim 3, wherein the inner surface (11) of the lens body (1) is concave in an arc surface to form the shaping region adjusting arc (6), and the outer surface (10) of the lens body (1) is not protruded outwards due to the shaping region adjusting arc (6).
  5. 5. The cornea shaping lens designed by the myopia prevention and control ring according to claim 4, wherein the edge of the shaping area adjusting arc (6) is provided with a micro-arc transition surface (60), the micro-arc transition surface (60) is used for transitionally connecting the shaping area adjusting arc (6) and other areas of the lens main body (1), and the micro-arc transition surface (60) is not more than 0.2mm.
  6. 6. A myopia prevention and control ring designed cornea shaping lens according to claim 1, wherein the inner surface (11) of the lens body (1) is provided with micro-grooves (7), the micro-grooves (7) extend from the peripheral arc region (5) toward the center of the lens body (1) at least to the reverse arc region (3), and the micro-grooves (7) establish channels between the inside and outside of the lens body (1) to promote tear exchange.
  7. 7. The cornea shaping lens designed by the myopia prevention and control ring according to claim 6, wherein the inner surface (11) of the lens main body (1) is provided with a plurality of micro-grooves (7), and the micro-grooves (7) are distributed around the center of the base arc area (2) at equal angles.
  8. 8. The cornea shaping lens designed by the myopia prevention and control ring according to claim 6, wherein the micro-grooves (7) are cambered surface grooves with semicircular cross sections, and the diameter of the micro-grooves (7) is 0.1-0.3 mm.

Description

Cornea shaping mirror designed by myopia prevention and control ring Technical Field The invention relates to the technical field of lens design and manufacture, in particular to a cornea shaping lens with a myopia prevention and control ring design. Background As a non-operative myopia correction method, a cornea shaping lens designed by a myopia prevention and control ring is designed to adopt four key radian areas to realize effective shaping and refraction correction of the cornea. The four regions include a base arc region, a reverse arc region, a positioning arc region, and a peripheral arc region. The base arc area is used as a central optical area and is a core part in the cornea shaping lens design of the myopia prevention and control ring design. The main function of the device is to flatten the cornea through contact with the cornea, thereby achieving the effect of correcting the ametropia. However, since the morphology of the cornea is unique to each individual, the extent to which the base curve region can actually applanate will vary from individual to individual. This variability makes it quite complex to determine the ideal applanation area when dispensing. In order to further improve myopia prevention and control effects, the design of cornea shaping lenses with some myopia prevention and control rings makes the base arc area smaller. This design improves the control effect to some extent, but also has the disadvantage that on corneal topography, the applanation area exhibited by the smaller base curve area often does not reach a more optimal state, which makes it difficult for the physician to locate the central optical zone and evaluate its effect of applanating the cornea. Because of the uncertainty and difficulty in viewing the applanation area, it is difficult for a physician to accurately determine whether the central optical zone has reached the desired state of applanation of the cornea. This not only affects the corrective effect of the cornea shaping lens designed with the myopia prevention and control ring, but can also pose a potential risk to the vision and eye health of the patient. Disclosure of Invention Aiming at the problems described in the background technology, the invention provides a pair of cornea shaping lenses designed by myopia prevention and control rings, which redesigns the cornea shaping lenses designed by the conventional four-radian myopia prevention and control rings, and adds a specially designed radian structure in or near a central optical area so as to be convenient for judging whether the central optical area can achieve an ideal adaptation state of flattening cornea. In order to achieve the above purpose, the present invention adopts the following technical scheme: a cornea shaping lens designed by a myopia prevention and control ring comprises a lens body, wherein the lens body is of an arc-shaped sheet structure with a circular outline, the inner surface of the lens body is concave, the outer surface of the lens body is convex, the lens body comprises a base arc area, a reverse arc area, a positioning arc area, a peripheral arc area and a shaping area adjusting arc, the base arc area is a circular area positioned in the center of the lens body, the reverse arc area, the positioning arc area and the peripheral arc area are sequentially and outwards arranged in concentric rings from the base arc area, at least one shaping area adjusting arc is arranged in the base arc area, and the shaping area adjusting arc and the base arc area are concentric. Preferably, the distance between the adjusting arc of the shaping area and the center of the base arc area is d, and the range of d is 2.5-3.5 mm. The width of the adjusting arc of the shaping area is 0.5+/-0.3 mm, the longitudinal section of the adjusting arc of the shaping area forms an arc profile, and the formed arc profile is an arc of no more than or 1/2 circle. As a preferable scheme, the inner surface of the lens main body is a cambered surface concave to form the shaping area adjusting arc, and the outer surface of the lens main body is not outwards protruded due to the shaping area adjusting arc. As a preferable scheme, the edge of the adjusting arc of the shaping area is provided with a micro-arc transition surface, the micro-arc transition surface is used for transitionally connecting the adjusting arc of the shaping area and other areas of the lens main body, and the micro-arc transition surface is not more than 0.2mm. Preferably, the inner surface of the lens body is provided with micro-ravines which extend from the peripheral arc region toward the center of the lens body at least to the reverse arc region, and the micro-ravines establish a channel between the inside and the outside of the lens body to promote tear exchange. As a preferable scheme, the inner surface of the lens main body is provided with a plurality of micro-ravines, and the micro-ravines are distributed around the center of the