Multifocal contact lens for improving vision of presbyopia and related methods and uses

A contact lens and multi-focal technology, applied in glasses/goggles, optical components, instruments, etc., can solve problems such as inventory increase

Active Publication Date: 2017-03-22
COOPERVISION INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also not desirable for a contact lens manufacturer or distributor or both to provide a large number of lens combinations to an ECP because increasing the number of lens designs and combinations for different spherical powers and additive powers results in having to be made and stored to be supplied to an ECP or Inventory provided by individuals increases

Method used

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  • Multifocal contact lens for improving vision of presbyopia and related methods and uses
  • Multifocal contact lens for improving vision of presbyopia and related methods and uses
  • Multifocal contact lens for improving vision of presbyopia and related methods and uses

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0147] Manufacturing of multifocal contact lenses

[0148] as above and as Figure 1A The multifocal contact lenses illustrated in - IF with aspheric power profiles were produced using a static cast molding process.

[0149] The metal insert is machined to form an optical quality surface corresponding to that of a multifocal contact lens. A nominal or target or predetermined aspheric power profile is used to form the aspheric power profile within the Optic Zone portion of the optical quality surface of the Insert. Examples of nominal aspheric power distributions are illustrated in Figures 1C-1F.

[0150] The inserts are placed in an injection molding machine to form a contact lens mold cavity when the inserts are placed close to each other. Contact lens mold material (eg, particles of polystyrene, polypropylene, vinyl alcohol polymers, etc.) is melted and injected into the contact lens mold cavity to form female and male contact lens mold members. The female contact lens mo...

example 2

[0157] Visual Acuity - Moderate Add Light Individuals

[0158] Select a group of presbyopes who require a plus power correction of +1.25D to +1.75D (as determined by the ophthalmologist ECP; individual has a plus plus power prescription of +1.25D, +1.50D, or +1.75D) for use as described above and as Figure 1A -Illustrated in IF is the multifocal contact lens fitting of the present invention. So fitted multifocal contact lenses have an add power within the central 5 mm diameter (2.5 mm radial distance) of the optical zone of from about 1.00 D to less than 1.25 D, eg, about 1.15 D.

[0159] The ECP determines each individual's eye dominance, distance vision power correction, and down-add power needs. Optimal or complete correction of distance vision in the dominant eye with the first multifocal contact lens of the present invention (eg, the distance vision refractive power of the first multifocal contact lens corresponds to the distance vision prescription for the dominant e...

example 3

[0167] Visual Acuity - Highly Added Light Individuals

[0168] Select a group requiring an add power correction of +2.00D or greater (as determined by the ophthalmologist ECP; individuals with +2.00D, +2.25D, +2.50D, +2.75D, or +3.00D Refractive power prescription) for presbyopia as described above and as Figure 1A -Illustrated in IF is the multifocal contact lens fitting of the present invention. So fitted multifocal contact lenses have an add power within the central 5 mm diameter of the optical zone of from about 1.00 D to less than 1.25 D, eg, about 1.15 D. These lenses had the same design or the same power distribution as the Lens A lens described in Example 2.

[0169] This highly under-addition individual group is suitable for either the Lens A lens or the Lens B lens, as described in Example 2. The main difference between Example 2 and Example 3 is that the individual of Example 3 required a higher additive power correction as determined by the ECP.

[0170] Simi...

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PUM

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Abstract

The present invention describes multifocal contact lenses as well as methods and uses. The multifocal contact lens includes an optic zone. The optic zone has an aspheric power profile that provides near vision power and distance vision power and provides an additive power corresponding to the near vision power and the distance vision power The difference between the refractive powers. The multifocal contact lens can improve the binocular vision of the presbyopia through the following prescription: the non-dominant eye contact lens has been corrected for distance vision, and the two multifocal contact lenses are all corrected for the individual's lower added refractive power. undercorrection. Lots and sets of multifocal contact lenses are also described herein.

Description

[0001] This application claims the benefit of prior U.S. Provisional Patent Application No. 61 / 594,859, filed February 3, 2012, under 35 U.S.C. § 119(e), which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to multifocal contact lenses and methods of making and using multifocal contact lenses, as well as batches and sets of multifocal contact lenses. Background technique [0003] Contact lenses have been described as useful in correcting presbyopia. 一些用于治疗老花眼或改善老花者视力的方法和装置已描述于(例如)EP0201231A1、EP2183639A1、GB2086605A、US5220359、US5715031、US5754270、US5771088、US5835192、US6322213、US6520638、US6540353、US7517084、US7625086、US7753521、US20090051870A1 , US20100321632A1, US2011310347A1, WO0008516 and WO0135880. [0004] As an example, in a monocular vision correction system, a presbyopic person wears a contact lens in one eye that is only designed to correct distance vision (e.g., the lens has a single-marked spherical power to c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/02G02C7/04
CPCG02C7/027G02C7/042G02C7/044G02C7/041
Inventor 阿瑟·巴克
Owner COOPERVISION INT LTD
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