Accommodating intraocular lens having T-shaped haptics
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a technology of haptics and accommodating lenses, which is applied in the field of intraocular lenses, can solve the problems of fibrosis tissue pockets that cannot be easily formed, and achieve the effect of increasing the accommodation amplitude of the lens, increasing the optical power of the lens, and thereby the amoun
Inactive Publication Date: 2005-12-01
THE NICE TRUST
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[0026] A primary and perhaps the most important aspect of the invention is concerned with increasing the accommodation amplitude of the lens, that is the distance the lens optic moves along the axis of the eye during contraction of the ciliary muscle from its relaxed distant vision state to its contracted near vision state. This amplitude is commonly measured and stated in units which are referred to as diopters of accommodation. The maximum accommodation amplitude or diopters of accommodation which the eye will accommodate varies from patient to patient. Some patient's eyes, for example, will accomodate on the order of 3.5 diopters of accommodation. Other patient's eyes will accommodate a maximum of only about 1.75 diopters of accommodation. Accordingly, it is desireable that an accommodating intraocular lens according to this invention be capable of at least 3.5 diopters of accommodation so that it can be used on a patient who can accommodate such a lens
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This ciliary muscle action during fibrosis would result in improper formation of t
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[0054] Turning now to these drawings, and first to FIG. 3, there is illustrated a human eye 10 whose natural crystalline lens matrix has been removed from the natural lens capsule of the eye through an anterior opening in the capsule formed by an anterior capsulotomy, in this case a continuous tear circular capsulotomy, or capsulorhexis. As noted earlier, this natural lens matrix, which is normally optically clear, often becomes cloudy and forms a cataract which is cured by removing the matrix and replacing it with an artificial intraocular lens.
[0055] As mentioned earlier, continuous tear circular capsulotomy, or capsulorhexis, involves tearing the anterior capsule along a generally circular tear line in such a way as to form a relatively smooth-edged circular opening in the center of the anterior capsule. The cataract is removed from the natural lens capsule through this opening. After completion of this surgical procedure, the eye includes an optically clear anterior cornea 12, ...
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Abstract
An accommodating intraocular lens having anteriorly and posteriorly movable extended portions, such as T-shaped haptics, extending from a central optic to be implanted within a natural capsular bag of a human eye with the extended portions positioned between an anterior capsular rim and a posterior capsule of the bag, whereby during a post-operative healing period, fibrosis occurs about the extended portions to fixate the lens in the bag in a manner such that subsequent natural contraction and relaxation of the ciliary muscle moves the optic to provide vision accommodation of increased accommodation amplitude and diopters of accommodation.
Description
RELATED APPLICATIONS [0001] This application is a continuation of co-pending application Ser. No. 10 / 454,280 filed on Jun. 3, 2003 which is a continuation of co-pending application Ser. No. 10 / 057,691 filed Jan. 24, 2002, now U.S. Pat. No. 6,638,306, which is a divisional application of application Ser. No. 08 / 858,978 filed May 20, 1997, now U.S. Pat. No. 6,387,126 issued May 14, 2002, which is a continuation-in-part of application Ser. No. 08 / 388,735 filed Feb. 15, 1995, now abandoned. [0002] Reference is made to co-pending application Ser. No. 08 / 640,118, which is a continuation, with intermediate continuation applications of my U.S. Pat. No. 5,476,514. Reference is also made to U.S. Pat. No. 5,496,366. BACKGROUND OF THE INVENTION [0003] This invention relates generally to intraocular lenses to be implanted within a natural capsular bag in the human eye formed by evacuation of the crystalline matrix from the natural lens of the eye through a anterior capsulotomy in the lens. The i...
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