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Four-quadrant area ambitus out-of-focus corneal contact lens

A technology of contact lenses and contact lenses, applied in glasses/goggles, optics, instruments, etc., can solve the problem of inability to correct refractive errors in four quadrants, affecting the wearing comfort and stability of contact lenses, peripheral Defocused contact lenses failed to achieve a reasonable fit and other issues

Inactive Publication Date: 2016-09-28
段亚东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The myopic eyeball is a non-perfect spherical shape, and there are 4 different diopters around the four quadrants of the retina. The upper and lower retinas show myopic defocus, and the nasal and temporal retinas show hyperopic defocus. Each axis of the four quadrants presents a different refractive error. The existing peripheral defocused contact lens cannot correct four quadrants and each axis has a different refractive error. The existing peripheral defocused contact lens design there are still flaws
Existing contact lenses are only designed with one base arc, and the front surface of the cornea presents different curvature radii from the center to the periphery, and the curvature radius of the back surface of the contact lens does not match the curvature radius of the front surface of the cornea, which affects the wearing comfort and stability of the contact lens sex
The design of peripheral defocusing contact lenses remains one of the technical challenges that has never been successful

Method used

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  • Four-quadrant area ambitus out-of-focus corneal contact lens
  • Four-quadrant area ambitus out-of-focus corneal contact lens
  • Four-quadrant area ambitus out-of-focus corneal contact lens

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: Full quadrant area aspheric contact lens (Type I)

[0047] The four quadrant areas around this type of contact lens are designed with positive addition, and the positive addition is less than +1.00D, and the four quadrant areas are prepared as aspheric surfaces. This type of contact lens is prepared from 0.00D to -6.00D in the central area, +0.05D to +0.60D in the upper quadrant area, and +0.07D to +0.70D in the lower quadrant area, temporal side Positive bonus preparation for the quadrant area +0.09D to +0.90D, positive bonus preparation for the nasal quadrant area +0.11D to +1.00D. Positive value ratio of 4 quadrants: Nasal quadrant > temporal quadrant +0.05D to +0.30D, temporal quadrant > lower quadrant +0.05D to +0.20D, lower quadrant > upper Quadrant +0.05D to +0.20D. Positive additions in all four quadrants of this type of contact lens are less than +1.00D. Ren Jianfeng, Master's thesis of Soochow University in 2006 explained: Aspheric lens periph...

Embodiment 2

[0048] Example 2: Temporal Nasal Quadrant Corneal Contact Lens (Type II)

[0049]For this type of contact lens, the temporal and nasal quadrants have a positive addition of more than +1.00D, the central area has a positive addition of 0.00D to -6.00D, and the upper quadrant has a positive addition of +0.05D to +0.60D. , Positive bonus preparation in the lower quadrant area +0.07D to +0.70D, positive bonus preparation in the temporal quadrant area from +1.00D to +2.50D, positive bonus preparation in the nasal quadrant area from +1.25D to +3.00D. Positive value ratio of 4 quadrants: Nasal quadrant > temporal quadrant +0.50D to +1.50D, temporal quadrant > lower quadrant +0.50D to +0.75D, lower quadrant > upper Quadrant +0.05D to +0.20D. The design of this type of contact lens not only considers the correction of hyperopic defocus on the nasal and temporal periphery of the retina, but also considers the aspheric design of the upper quadrant, central area and lower quadrant area. ...

Embodiment 3

[0050] Embodiment Three: Adjusting Lag Defocus Contact Lens (Type III)

[0051] For this type of contact lens, the temporal and nasal quadrants, as well as the lower quadrant, have positive additions greater than +1.00D, the central area has a positive addition of 0.00D to -6.00D, and the upper quadrant has positive additions of +0.05. D to +0.60D, Positive bonus preparation in the lower quadrant +1.00D to +1.50D, Positive bonus preparation in the temporal quadrant +1.00D to +2.50D, Positive bonus preparation in the nasal quadrant +1.25D to +3.00D. Positive value ratio of 4 quadrants: Nasal quadrant > temporal quadrant +0.50D to +1.50D, temporal quadrant > lower quadrant +0.10D to +1.00D, lower quadrant > upper Quadrant +0.10D to +1.00D. Or the positive bonus of the upper quadrant, temporal quadrant and nasal quadrant is less than +1.00D, and the positive bonus of the lower quadrant is greater than +1.00D. Nearsightedness can produce adjustment hysteresis hyperopia defocus,...

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Abstract

Four-quadrant peripheral defocus contact lenses are corneal contact lenses. The surface shape of the contact lens of the present invention includes an optical zone and a fixed zone, the diameter of the optical zone is 6.0mm to 8.0mm, including 1 central zone and 4 quadrant zones, the diameter of the central zone is 0.8mm to 3.0mm, and the width of each quadrant zone is 1.0mm to 3.0mm mm, where the central area is prepared from 0.00D to ‑6.00D, the 4 quadrants are positively added relative to the central area, the upper quadrant is positively added +0.05D to +1.00D, and the lower quadrant is positively added Prepare +0.07D to +2.00D, prepare +0.09D to +3.00D in the positive quadrant area of ​​the temporal side, and prepare +0.11D to +3.50D in the positive quadrant area of ​​the nasal side, and prepare 4 diopters with different diopters For the quadrant area, prepare the full quadrant area aspheric surface, defocus the temporal nasal quadrant area or adjust the hysteresis defocus contact lens.

Description

technical field [0001] The invention relates to the technical field of contact lenses, and provides a four-quadrant peripheral defocusing corneal contact lens with aspheric surface design for correcting hyperopic defocus around the retina and correcting nearsightedness adjustment lag, which is used for wearing by myopia patients, especially It is used for prevention and control of myopia in adolescents. Background technique [0002] Today's medical consensus: the main pathogenesis of juvenile myopia is caused by hyperopic defocus and accommodation lag in the periphery of the retina, and peripheral defocus spectacle lenses are the core correction tools for myopia. The world's first peripheral defocusing spectacle lens was launched by Carl Zeiss in August 2010, and the trade name is Zeiss Changle Spectacle Lens. Smith EL, the inventor of Zeiss Changle spectacle lenses, measured the peripheral refraction of the retina in 1155 children with myopia at -2.27±0.81D after the spect...

Claims

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Application Information

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IPC IPC(8): G02C7/04
CPCG02C7/04
Inventor 段亚东杨欣斌葛坚曾骏文陈翔
Owner 段亚东
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