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Ophthalmic lens element for myopia correction

一种镜片、近视的技术，应用在眼镜/防护镜、眼镜/护目镜、光学等方向，能够解决不能消除近视加深的促进因素等问题

Active Publication Date: 2008-12-03
CARL ZEISS VISION AUSTRALIA HO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Unfortunately, common myopia correcting lenses occasionally produce sharp or defocused images in the peripheral regions of the retina, so current myopia correcting glasses do not eliminate the contributing factors of myopia progression

Method used

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  • Ophthalmic lens element for myopia correction
  • Ophthalmic lens element for myopia correction
  • Ophthalmic lens element for myopia correction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] Figure 1A A lens 100 according to an embodiment of the present invention is shown, with a central refractive index of -3.00D and a diameter of 60 mm. Figure 1B A side view of the lens 100 along section A-A' is shown, but shown shortened to a diameter of 50 mm to fit the frame.

[0109] The illustrated lens 100 is an aspheric single vision mirror 100 comprising a central zone 102 and a peripheral zone 104 . Such as Figure 1B As shown, the lens 100 also includes a front side 108 and a back side 110 . In the illustrated example, the central region 102 is bounded by a 0.5D surface astigmatism contour. In the present case, the central zone 102 extends radially to a radius of about 11 mm (R p1 ) outer boundary.

[0110] Within the central region 102, the front face 108 provides a central top curvature of 3.00D (lens material with a refractive index of 1.53) extending to a radius (Rc) of about 5 mm. This radius corresponds to an eye rotation of about 10°. Front side 1...

example 2

[0137] Figure 3A Another example lens 200 of an embodiment of the invention is shown. In this column, lens 200 includes front face 108 with the same top curvature as lens 100 of Example 1, but with a higher average marginal curvature in the peripheral zone relative to the central zone refractive index, corresponding to an optical correction of +1.00D. The refractive index of the mirror 200 and the central region 102 are the same as in Example 1.

[0138] The front face 108 uses the same mathematical description method as in Example 1, and some parameters that are changed are listed in Table 2.

[0139] parameters

value

R 0

176.6mm

R 1

139.5mm

t

0.001

m

0

n

0.0000003

p

5.5

a

1.0

b

1.0

[0140] Table 2

[0141] Figures 4A-4C Various characteristics of the front face 108 of the lens 200 are shown.

example 3

[0143] Figure 5A Shown is an example of a lens 300 of a 1.6 refractive index material, including the front face 108, whose marginal radius of curvature is 136.5mm, and the curvature of the top is the same as in Examples 1 and 2, relative to the refractive index of the central region 102, which is equivalent to about +1.00D in the peripheral region 104 optical correction. That is, in this example, the average top curvature of the lens 300 is 3.4D, and the average edge curvature at a radius of 20 mm from the center of the lens is 4.39D.

[0144] The front face 108 applies the same mathematical description method as in examples 1 and 2, with a small number of parameters changed. The modified parameter values ​​are listed in Table 3.

[0145] parameters

value

R 0

176.67mm

R 1

136.5mm

t

0

m

0

n

0.0000028

p

2.5

a

1.0

b

1.0

[0146] table...

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PUM

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Abstract

An ophthalmic lens element (100) for correcting myopia in a wearer's eye is disclosed. The lens element (100) includes a central zone (102) and a peripheral zone (104). The central zone (102) provides a first optical correction for substantially correcting myopia associated with the foveal region of the wearer's eye. The peripheral zone (104) surrounds the central zone (102) and provides a secondoptical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer's eye. A system and method for dispensing or designing an ophthalmic lens element for correcting myopia in a wearer's eye is also disclosed.

Description

[0001] This application claims priority to Australian Provisional Patent Application No. 2005905621, filed 12 October 2005, and Australian Provisional Patent Application No. 2005906150, filed 7 November 2005, the contents of which are incorporated herein by reference. technical field [0002] The present invention relates to lenses for correcting myopia and the design of such lenses. Background technique [0003] For focused vision, the eye must be able to gather light on the retina. However, the eye's ability to gather light on the retina depends primarily on the shape of the eyeball. If the eyeball is "too long" relative to its "on-axis" focal length (meaning the focal length along the optical axis of the eye) or if the outer surface of the eye (ie, the cornea) is too curved, the eye cannot properly focus on distant objects on the retina. Likewise, eyeballs that are "too short" relative to their on-axis focal length, or whose outer surface is too flat, will correctly focu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/02
CPCG02C7/063G02C2202/24G02C7/06G02C7/02G02C7/00
Inventor S·R·瓦纳斯S·W·费什尔R·S·斯帕拉提
Owner CARL ZEISS VISION AUSTRALIA HO
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