Intraocular lens

• US 4,159,546 A
• Filed: 06/15/1977
• Issued: 07/03/1979
• Est. Priority Date: 06/15/1977
• Status: Expired due to Term

• Current Assignee: Shearing Steven P Intermedics Incorporated Intermedics Intraocular Incorporated
• Original Assignee: Steven P. Shearing
• Inventors: Shearing, Steven P.
• Primary Examiner(s): Frinks, Ronald L.
• Application Number:
  US05/806,957
• Time in Patent Office: 748 Days
• Field of Search: 3/13, 3/1
• US Class Current: 128/898
• CPC Class Codes: A61F 2/16 Intraocular lenses
• CPC Class Codes: A61F 2/161 Posterior chamber lenses for use in addition to the natural lenses of the eyes
• CPC Class Codes: A61F 2002/1683 having filiform haptics
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol

Abstract

An improved intraocular lens comprises a plastic lens body and a plurality of flexible and memory retaining non-biodegradable strands, each strand having one end secured to the lens body and the opposite end unsecured. Preferably, the strands are composed of polypropylene. In cataract surgery, following either intra or extra capsular extraction, the lens of the invention is implanted in the posterior chamber.

Claims

1. In a cataract surgery following capsular extraction, a method of implanting an intraocular lens having an acrylic resin lens body and first and second flexible and memory retaining curved looped strands wherein one end of each strand is secured adjacent the peripheral edge of said lens body and the other end is unsecured, comprising inserting said lens through the pupil with said first strand first followed by said lens body, directing said first strand against the ciliary body, further urging said lens through the pupil thereby compressing said first strand until said second strand passes through said pupil, and directing said second strand against the ciliary body opposite said first strand, whereby the entire lens is located within the posterior chamber and posterior to the iris.

2. In cataract surgery following capsular extraction, a method of implanting an intraocular lens having a plastic lens body and first and second flexible and memory retaining curved looped strands wherein one end of each strand is secured adjacent the peripheral edge of said lens body and the other end is unsecured, comprising inserting said lens through the pupil with said first strand first followed by said lens body, directing said first strand into the posterior chamber, further urging said lens through the pupil and into the posterior chamber thereby compressing said first strand within the posterior chamber until said second strand passes through said pupil and into the posterior chamber, and directing said second strand opposite said first strand in the posterior chamber, whereby the entire lens is located and fixed within the posterior chamber and posterior to the iris.

3. The method of claim 2 wherein said capsular extraction is an extracapsular extraction in which at least a portion of the capsule remains in the posterior chamber and whereby said lens is inserted into said posterior chamber and fixed by the capsule therein.

4. In cataract surgery following capsular extraction, a method of implanting an intraocular lens having a plastic lens body and a plurality of flexible and memory retaining curved looped strands wherein one end of each strand is secured adjacent the peripheral edge of said lens body and the other end is unsecured, comprising inserting said lens through the pupil with a first one of said strands first following by said lens body, directing said first strand into the posterior chamber, and further urging said lens through the pupil and into the posterior chamber thereby compressing said first strand within the posterior chamber until the other of said strands pass through said pupil and directing said other strands into the posterior chamber, whereby the entire lens is located and fixed within the posterior chamber and posterior to the iris.