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Two optical elements which, in combination, form a lens of variable optical power for application as an intraocular lens

A technology of optical components and focal power, applied in the field of lens, can solve the problem of losing the natural adjustment function of the eyes, and achieve the effect of changing the optical characteristics

Active Publication Date: 2007-03-07
AKKOLENS INT BV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Also, due to the fixed optical power, the natural accommodation of the eye is lost

Method used

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  • Two optical elements which, in combination, form a lens of variable optical power for application as an intraocular lens
  • Two optical elements which, in combination, form a lens of variable optical power for application as an intraocular lens
  • Two optical elements which, in combination, form a lens of variable optical power for application as an intraocular lens

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Embodiment Construction

[0023] First, the principles on which these inventions are based will be explained. Figure 1 shows two optical elements 1, 2 with specific optical surfaces 3, 4 that can be moved laterally, which results in a variable optical power over the central area where the optical elements 1, 2 overlap. lens. This principle is described in US-A-3 305 294.

[0024] This lens effect is achieved by "saddle" surfaces 3, 4 on one or both sides of the optical elements 1, 2, which is a well-known principle. However, it is also possible to use diffractive structures or diffraction gratings, eg according to the GRIN principle. Here, flat optical elements comprising materials with different refractive indices are used. Although it is now envisaged that the optical elements 1, 2 are translated relative to each other, the elements can also be designed such that a lens effect is achieved by rotation of the optical elements 1, 2 relative to each other. There may or may not be a connection between...

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Abstract

The invention relates to an artificial intra ocular lens of variable optical power, comprising at least two optical elements which can be shifted relative to each other in a direction extending perpendicular to the optical axis wherein the optical elements have such a shape that they exhibit, in combination, different optical powers at different relative positions. This results in a construction which has such a low weight that it is applicable as an intra ocular lens of adjustable optical power. According to a first preferred embodiment the lens comprises positioning means the optical elements in the eye and driving means, which can be operated by the user to execute a movement of at least one of the optical elements relative to the other optical element. This embodiment can be used to correct the accommodation function.

Description

technical field [0001] The present invention relates to a lens. Background technique [0002] Such lenses are well known. Intraocular lenses are especially used to treat cataracts to replace the opaque cataract's natural lens. These lenses have a fixed optical power. Due to changes in the optical properties of the eye, eg due to aging, the optical power of the lens can become less than optimal. The power must be corrected by eyeglasses or by surgical replacement of the lens with a new lens. [0003] Also, due to the fixed optical power, the natural accommodation function of the eye will be lost. As a result, people with implanted lenses must rely on eyeglasses to help with accommodation. [0004] To avoid these disadvantages, a lens that facilitates accommodation as well as accommodating is required. SUMMARY OF THE INVENTION [0005] This object is achieved in that the lens comprises at least two optical elements movable relative to each other in a direction extendin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/16
CPCA61F2/1632A61F2/1648A61F2002/1681A61F2250/0018
Inventor 米希尔·克里斯蒂安·龙巴赫
Owner AKKOLENS INT BV
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