Method of optical treatment

a technology of optical treatment and focusing power, applied in the field of optical treatment, can solve the problems of ineffective clinically proven optical treatment methods for the size/length of the eye, inaccurate axial growth, and reducing the focusing power of the eye's optical elements, so as to improve the focusing power and enhance the hyperopic defocus

Active Publication Date: 2012-12-11
THE HONG KONG POLYTECHNIC UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach effectively slows, stops, or reverses myopia progression by enhancing myopic defocus and promotes or reduces hyperopia by enhancing hyperopic defocus, maintaining normal vision while treating refractive disorders.

Problems solved by technology

They are generally described as an imbalance between the focusing power of optical elements of the eye and the size / length of the eye.
It is generally accepted that these disorders are results of inaccurate axial growth during post-natal development of the eyes.
For example, insufficient ambient myopic defocus may cause myopia.
On the other hand, excessive ambient myopic defocus may cause hyperopia.
They do not eliminate or deal with the cause of the disorders, but are just prosthetic.
The existing optical treatments to retard the progression of myopia by relieving the eye's accommodation during near visual tasks are recently shown to be clinically ineffective.

Method used

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Embodiment Construction

[0033]The present invention is directed to a method for treating progression of a refractive disorder in a human eye. Particularly, the present invention provides a method for counteracting the development of myopia by enhancing myopic defocus. The present invention also provides a method for counteracting the development of hyperopia by enhancing of hyperopic defocus. The apparatuses used in practice of the present invention alter the defocus equilibrium of the eye to influence axial eye growth in a direction towards emmetropia.

[0034]The artificial shift of the defocus equilibrium in the optical system of the eye may be introduced by any desired method, for example by spectacle lens, spectacle lens add-on, contact lens, corneal shape-modification, ocular implant or designated viewing system. It is preferred that the shift be introduced together with the conventional correction so that normal vision can be maintained throughout the treatment. This means that a focused image must be ...

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Abstract

A method for treating progression of a refractive disorder in a human eye. The method includes the steps of producing a first image on a retina of the human eye and producing a second image to generate a defocus.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a method of optical treatment. In particular, the present invention relates to a method for treating progression of refractive disorders, such as myopia and hyperopia, in human eyes.BACKGROUND OF THE INVENTION[0002]The retina is the innermost layer of an eyeball and is the place where optical images created by the lens of the eye is focused. The information from the images are turned into nerve impulses, which are then sent to the brain via the optic nerve. If the retina does not coincide with the resultant focal point of the optical elements of the eye, defocus is generated. As used herein, the term “defocus” refers to the shift of the optical images to a point behind or in front of the retina. The human eye has a feedback mechanism that regulates the growth of the eye to achieve an optimal balance between the size / length of the eye and the focal length of the optical elements of the eye. This feedback mechanism is called...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): A61B3/00
CPCA61F9/00G02B3/08G02B5/1876G02C7/02G02B5/1895G02C2202/20G02C2202/10G02C2202/24
InventorTO, CHI HOLAM, SIU YINTSE, YAN YIN
OwnerTHE HONG KONG POLYTECHNIC UNIV