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Pseudo-accomodative iol having diffractive zones with varying areas

A diffraction zone and lens technology, applied in the fields of multifocal spectacle lenses and trifocal spectacle lenses

Active Publication Date: 2010-09-29
ALCON INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this traditional trifocal lens has many disadvantages

Method used

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  • Pseudo-accomodative iol having diffractive zones with varying areas
  • Pseudo-accomodative iol having diffractive zones with varying areas
  • Pseudo-accomodative iol having diffractive zones with varying areas

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Embodiment Construction

[0035] The present invention is generally directed to trifocal lenses, such as intraocular lenses that provide near, intermediate and distance vision. The trifocal lenses of the present invention advantageously provide enhanced vision performance for intermediate vision compared to conventional trifocal lenses, while retaining and in many cases exceeding the near and distance vision performance of such conventional lenses. In the examples discussed below, various aspects of the trifocal lens of the present invention are illustrated with respect to an intraocular lens. However, it should be understood that the principles of the present invention are similarly applicable to the manufacture of other ophthalmic lenses, such as contact lenses.

[0036] refer to Figure 1A and 1B A trifocal lens 10 according to one embodiment of the present invention includes an optic 12 having a front optical surface 14 and a rear optical surface 16 . In this embodiment, the front and rear optica...

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Abstract

In one aspect of the invention, a trifocal ophthalmic lens is disclosed that includes an optic having at least one optical surface, and a plurality of diffractive zones that are disposed on a portion of that surface about an optical axis of the optic. At least two of those diffractive zones have different areas so as to cause broadening of optical energy profiles at a near and a far foci of the diffractive zones for generating an intermediate focus.

Description

[0001] This application is a divisional application of an invention patent application with an application date of February 9, 2007, an application number of 200780012530.6, and an invention title of "Pseudo-Adjustable Intraocular Lens with Diffraction Zones with Different Areas". [0002] Cross References to Related Applications [0003] This application claims priority under 35 U.S.C §119 to U.S. Patent Application No. 11 / 350,497, filed February 9, 2006, which is hereby incorporated by reference in its entirety. Background technique [0004] The present invention relates generally to multifocal ophthalmic lenses, and more particularly to trifocal ophthalmic lenses, such as trifocal intraocular lenses (IOLs). [0005] A variety of spectacle lenses are available for correcting visual disorders such as cataracts, nearsightedness, farsightedness, or astigmatism. For example, an intraocular lens (IOL) may be implanted in a patient's eye during myopia surgery to compensate for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/06A61F2/16
CPCA61F2002/1697G02C2202/20A61F2/1613G02C7/06A61F2002/1699A61F2/1618A61F2/1654A61F2250/0014G02C7/04A61F2/16
Inventor 洪昕S·J·万诺张晓啸
Owner ALCON INC
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