Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Eye prosthesis – Intraocular lens
Patent
1985-01-08
1986-04-08
Frinks, Ronald L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Eye prosthesis
Intraocular lens
A61F 216
Patent
active
045810338
ABSTRACT:
An intraocular lens suitable for implantation providing four points of supporting contact within the eye and having, in unitary construction, a generally circular central lens body having, in the circular plane of the lens, centered about the 12:00 o'clock position a flat tab for manipulating the device during implantation or removal, and, in definition relative to a projection in the same plane defined by the tab and lens body, two flexible haptic lines symmetrically centered about the 6:00 o'clock position emerging between the 4:00-5:30 and 6:30-8:00 regions, respectively, which haptic lines radiate away from the central lens body following arcs defined by a common radius 0.40-0.60 times the planar radius of the central lens body; wherein said haptics symmetrically trace smooth, diverging curves ("knees") ranging from 30.degree.-50.degree. and proceed, respectively, parallel to lines tangent to the central lens body at points in the region 7:30-8:30 and 3:30-4:30, respectively; wherein each haptic terminates in identical, generally circular, discs ("footplates") in the common plane defined by the haptics, radiating outward and tangent to the medial surface of the haptic with said footplate having a radius ranging from 0.15-0.25 times the radius of the central lens body; wherein the outer perimeter of the two footplates and the outer perimeter of the two knees defined by said diverging curves of the haptics provide the four points of supporting contact in the anterior angle (anterior chamber placement), in the ciliary sulcus (posterior chamber placement), or in the capsular sac (posterior chamber placement).
REFERENCES:
patent: 4174543 (1979-11-01), Kelman
patent: 4363143 (1982-12-01), Callahan
patent: 4370760 (1983-02-01), Kelman
patent: 4463458 (1984-08-01), Seidner
patent: 4494254 (1985-01-01), Lopez
patent: 4504981 (1985-03-01), Walman
"Kelman Omnifit II", advertisement Precision-Cosmet Company, Inc. 1983 (one page).
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