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Multifocal contact lenses and related methods and uses to improve vision of presbyopic subjects

A contact lens, multi-focus technology, used in glasses/goggles, optical components, instruments, etc., to solve problems such as increased inventory

Active Publication Date: 2014-12-10
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 lenses and related methods and uses to improve vision of presbyopic subjects
  • Multifocal contact lenses and related methods and uses to improve vision of presbyopic subjects
  • Multifocal contact lenses and related methods and uses to improve vision of presbyopic subjects

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0147] Manufacturing of multifocal contact lenses

[0148] as above and as Figures 1A-1F Multifocal contact lenses with aspheric power profiles illustrated in are 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 the Figure 1C-1F middle.

[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...

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 Figures 1A-1F The multifocal contact lens fitting of the present invention is illustrated in FIG. 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 domina...

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 Figures 1A-1F The multifocal contact lens fitting of the present invention is illustrated in FIG. 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] ...

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Abstract

Multifocal contact lenses and methods and uses are described. The multifocal contact lenses include an optic zone. The optic zone has an aspheric power profile that provides a near vision refractive power and a distance vision refractive power, and provides an Add power that corresponds to the difference between the near vision refractive power and the distance vision refractive power. The multifocal contact lenses can improve binocular vision of presbyopic subjects by being prescribed such that the non-dominant eye contact lens is over-corrected for distance vision, and both multifocal contact lenses are under-corrected for the Add power requirement of the subject. Batches and sets of multifocal contact lenses are also described.

Description

[0001] This application claims the benefit of prior US Provisional Patent Application No. 61 / 594,799, filed February 3, 2012, under 35 U.S.C. §119(e), which is incorporated herein 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 corr...

Claims

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Application Information

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IPC IPC(8): G02C7/02G02C7/04
CPCG02C7/044G02C7/042G02C7/041G02C7/027
Inventor 阿瑟·巴克光-曼·阿什利·图安
Owner COOPERVISION INT LTD
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