U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Corrective intraocular lens

Patent 5480428 Issued on January 2, 1996. Estimated Expiration Date: Icon_subject April 22, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Corrective lens for the natural lens of the eye
Patent #: 4585456
Issued on: 04/29/1986
Inventor: Blackmore

Artificial lens and the method for implanting such lens
Patent #: 4769035
Issued on: 09/06/1988
Inventor: Kelman

Arrangement in an intraocular anterior chamber lens
Patent #: 4816032
Issued on: 03/28/1989
Inventor: Hetland

Optical lens having at least one stenopaeic opening located in the central area thereof
Patent #: 4994080
Issued on: 02/19/1991
Inventor: Shepard

Corrective intraocular lens Patent #: 5258025
Issued on: 11/02/1993
Inventor: Fedorov, et al.

Inventors

Assignee

Application

No. 231549 filed on 04/22/1994

US Classes:

623/6.14Lens body having through hole for pressure equalization

Examiners

Primary: Shay, Randy C.

Attorney, Agent or Firm

Foreign Patent References

  • 8902252 WO 03/13/1989
  • 9113597 WO 09/13/1991

International Class

A61F 002/16

Foreign Application Priority Data

1993-04-22 RU

Abstract

An intraocular lens includes a optical body including a posterior concave rface with a first radius of curvature, a periphery and a central, axially aligned opening that enhances liquid circulation in the eye, with the ratio of the height of the optical body to the overall height of the lens being between about 0.25 to about 0.5; a positioning element connected to the optical body periphery and including a periphery and a posterior concave surface with a second radius of curvature greater than the first radius of curvature, a ratio of the first to second radii of curvature being between about 0.31 to about 0.42; and end elements connected with opposite ends of the positioning element, each end element including a proximal end connected with the positioning element periphery, a distal end, a posterior concave surface forming a smooth continuation of the positioning element posterior concave surface and having a curvature identical therewith, and an anterior surface on an opposite side of the end element, the end element anterior surface having a substantially linear slope such that the end element decreases in thickness from the proximal end to the distal end, and the intraocular lens having an outer dimension defined by the distal ends of the end elements which prevents anchoring of the intraocular lens in an eye and thereby permits floating of the intraocular lens in the eye.

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