Anterior chamber intraocular lens

• US 4,560,383 A
• Filed: 10/27/1983
• Issued: 12/24/1985
• Est. Priority Date: 10/27/1983
• Status: Expired due to Fees

• Current Assignee: Larry G. Leiske
• Original Assignee: Larry G. Leiske
• Inventors: Leiske, Larry G.
• Primary Examiner(s): FRINKS, RONALD
• Application Number:
  US06/545,829
• Time in Patent Office: 789 Days
• Field of Search: 3/13, 3/1
• US Class Current: 623/6.51
• CPC Class Codes: A61F 2/16 Intraocular lenses
• CPC Class Codes: A61F 2/1605 Anterior chamber lenses for use in addition to the natural lenses of the eyes, e.g. iris fixated, iris floating
• CPC Class Codes: A61F 2002/1681 having supporting structure for lens, e.g. haptics
• CPC Class Codes: A61F 2002/1683 having filiform haptics

Abstract

Anterior chamber lens including a lens optic and two flexible opposing loops secured into a side edge of the optic. Each loop is substantially U-shaped and each opposing arm of the loop includes a slight ramp providing a vault for the lens with respect to each base member of each loop. The lens and loop are constructed from a single monomer or monofilament material, polymethylmethacrylate (PMMA), providing for stability, low mass, and flexibility. The loops are flexible in three degrees of freedom, particularly end-to-end. The lens can be utilized in both primary and secondary implantations with either intracapsular or extracapsular cataract extractions. Each lens end base member is kicked up at an angle with a flat portion disposed between the ramped portion and the base member. The base member can also be curved inwardly towards the lens. The kicked up ends eliminates and reduces ovaling of the pupil in addition to preventing the lens from bowing forward. The kicked up end of the base member can be in a range of 0.0-0.25 mm while 0.12 mm is the preferred range.

Claims

1. Anterior chamber lens comprising:

a. lens optic;

b. two opposing ramped U-shaped loops, each of said loops formed of a smooth, round, cylindrical member, and each of said loops including substantially rounded corners, each of said loops secured into opposing sides of said lens optic; and

,

c. each of said loops including a kicked-up end means including an end portion of each of said loops angled upwardly a finite height whereby said loops provide three-dimensional stability and flexibility in both primary and secondary implantations with either intracapsular or extracapsular cataract extractions and said kicked-up end means prevents ovaling of a pupil of an eye and bowing of said lens forward in said eye.

2. Lens of claim 1 wherein said kicked-up end provides a slightly planar portion to each of said loops between said kicked-up end means and said ramped loops.

3. Lens of claim 1 wherein said kicked-up end means provides an apexed portion between said ramped loops and said kicked-up end means.

4. Lens of claim 1 wherein ends of said loops are curved inwards.

5. Lens of claim 1 wherein said kicked-up end means are in a range of 0.05-0.25 mm from a lowest point of each of said loops.

6. Lens of claim 1 wherein said kicked-up end means are at 0.12 mm from a lowest point of each of said loops.