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Contact lenses for reducing myopia and methods for making the same

A technology of contact lenses and lenses, applied in glasses/protective glasses, glasses/goggles, applications, etc.

Active Publication Date: 2020-03-24
サイトグラスヴィジョンインコーポレイテッド
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in myopic individuals, the relative axial length of the eye relative to overall eye size continues to increase during development beyond the length that provides near-optimal focus on distant objects, resulting in increasingly pronounced myopia

Method used

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  • Contact lenses for reducing myopia and methods for making the same
  • Contact lenses for reducing myopia and methods for making the same
  • Contact lenses for reducing myopia and methods for making the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] refer to Figure 1Aand Figure 1B , the myopia reducing contact lens 100 includes a clear aperture 110 and a blurred region 120 . Clear aperture 110 has a lateral diameter CA. The blurred area 120 has a radial lateral dimension BR, where 2BR+CA is the diameter of the contact lens.

[0043] The size and shape of clear aperture 110 can vary. In general, the clear aperture 110 provides the wearer with a cone of vision for which their visual acuity can be optimally corrected (eg, corrected to 20 / 15 or 20 / 20). Typically, under normal indoor lighting conditions (such as common classroom or office lighting where a user can easily read text from a book), the lateral diameter CA is smaller than the user's pupil diameter. This ensures that under such lighting conditions the image contrast in the user's peripheral field of view is reduced.

[0044] In some embodiments, the aperture has a diameter ranging from about 0.2 mm (e.g., about 0.3 mm or greater, about 0.4 mm or greater...

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PUM

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Abstract

A method of making a contact lens includes providing a cylindrical blank for the contact lens, the cylindrical blank including a first portion and a second portion. The first portion is formed from ahomogenous, optically clear material and the second portion is formed from an inhomogeneous, optically-scattering material. The method includes shaping the cylindrical blank to provide the contact lens. The contact lens includes a first region surrounded by a second region, the first region being formed from the homogenous, optically clear material and the second region being formed from the inhomogeneous, optically-scattering material.

Description

technical field [0001] The invention features contact lenses for reducing myopia and methods of making such lenses. Background technique [0002] The eye is a visual sensor in which light from an external source is focused through the lens onto the surface of the retina, an array of wavelength-dependent photoreceptors. Each of the various shapes that the lens of the eye can take is associated with a focal length at which external light is optimally or nearly optimally focused to produce an inverted image on the surface of the retina corresponding to the external image observed by the eye . Each of the various shapes that the lens of the eye can take has the lens of the eye focus optimally or nearly optimally on light emitted or reflected by external objects located within a range of distances from the eye, and less optimally Focuses or fails to focus on objects located outside this distance range. [0003] In individuals with normal vision, the axial length of the eye, or...

Claims

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Application Information

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IPC IPC(8): G02C7/04G02C7/14A61F2/16
CPCG02C7/04G02C2202/24B29D11/00326B29D11/00038B29D11/00048G02C7/049
Inventor 小托马斯·W·沙尔伯格
Owner サイトグラスヴィジョンインコーポレイテッド