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Methods and apparatuses for controlling optical aberrations to alter modulation transfer functions

A modulation transfer function and optical aberration technology, applied in optics, optical components, refractometers, etc., can solve the problems of damaging the usefulness of devices, accelerating the development of myopia, and reducing visual functions, so as to achieve delayed refraction errors and high-quality visual images Effect

Inactive Publication Date: 2006-09-13
影像CRC有限公司
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  • Abstract
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Problems solved by technology

This impairs the usefulness of the device since the wearer's visual function is chronically reduced (for example, the wearer cannot drive due to legal vision requirements)
And, there are indications that undercorrection can even accelerate myopia progression

Method used

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  • Methods and apparatuses for controlling optical aberrations to alter modulation transfer functions
  • Methods and apparatuses for controlling optical aberrations to alter modulation transfer functions
  • Methods and apparatuses for controlling optical aberrations to alter modulation transfer functions

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Embodiment Construction

[0035] It has been shown that the optical stimuli that lead to the development of myopia when using vision devices such as spectacles, contact lenses, anterior chamber lenses or intra-ocular lenses (IOLs) are not the same as eye care practitioners. Refraction occurs strictly in the conventional manner (ie, spherical and astigmatic defocus) as prescribed by personnel, ophthalmologists, optometrists, and opticians. It has been shown that myopic patients have higher amounts of higher order optical aberrations (e.g. spherical aberration, i.e. not simply defocus or astigmatism), and that myopia is also associated with certain types of aberrations such as coma related to optical aberrations. Research has shown that myopic patients cannot accommodate as precisely or as easily as non-myopic patients (referred to as "accommodative lag", as defined below). Also, it is well known that accommodation is primarily driven by mid-spatial frequencies of about 5 cycles per degree (cpd).

[00...

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Abstract

A method and apparatus are disclosed for controlling optical aberrations to alter modulation transfer functions by providing an ocular system comprising a predetermined corrective factor to produce substantially corrective stimuli for repositioning medium- and high- spatial frequency peaks relative to one another to alter accommodative lag. The invention will be used to provide continuous, useful clear visual images while simultaneously retarding or abating the progression of myopia or hypermetropia.

Description

[0001] (cross reference) [0002] This application claims priority to US Provisional Application No. 60 / 475017, filed June 2, 2003. technical field [0003] The present invention is directed to methods and apparatus for slowing or eliminating the progression of myopia in an individual while providing sharp imaging by controlling aberrations and thereby manipulating the localization of mid to high spatial frequency peaks in the visual image. Background technique [0004] The incidence of myopia (nearsightedness) is increasing rapidly, especially among Asian children. Studies have shown, for example, that between 1986 and 2000, the incidence of myopia (-0.25D or higher) among 7-year-old Taiwanese children rose alarmingly from 4% to 16%, and among Taiwanese school-age children aged 16-18 The incidence rate of myopia (-0.25D or higher) is as high as 84%. A population-based study in mainland China reported that 55% of girls and 37% of boys aged 15 years suffered from severe myo...

Claims

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Application Information

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IPC IPC(8): G02C7/04A61B3/103G02C7/02
CPCG02C2202/20G02C7/028G02C7/04G02C7/02A61B3/103G02C2202/24
Inventor 赫马·拉达克里希南丹尼尔·奥利里阿瑟·霍布赖恩·霍尔登沙辛那·帕达姆理查德·卡尔弗
Owner 影像CRC有限公司
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