Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Eye prosthesis – Intraocular lens
Patent
1988-01-26
1989-09-05
Frinks, Ronald L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Eye prosthesis
Intraocular lens
A61F 216
Patent
active
048634646
ABSTRACT:
An intraocular lens having one or more flexible haptic support loops connected to an optic. Each haptic support loop includes a first segment connected to the optic and extending therefrom at an acute angle relative to the optic periphery, a second segment extending from the first segment in an arc having at least one radius of curvature smaller than the radius of the optic and at least one radius of curvature on the side of the haptic opposite the acute angle formed by the first segment, and a third segment extending from the second segment in an arc having one or more radii of curvature greater than the radius of the optic which terminates in a free end spaced outwardly from the optic periphery. The first segment extends from the optic substantially parallel to a horizontal reference line (HR) on the optic and the second segment extends beyond a reference line that is parallel to a vertical reference line (VR) on the optic and tangent to the outer peripheral edge of the optic with the free end of the third segment located in a quadrant formed by the horizontal and vertical reference lines that is adjacent to the quadrant in which the second segment is located. This support loop shape results in a highly flexible haptic with characteristics similar to those of the traditional open-loop haptic through a first small amount of compression, but then results in a greater stiffness after the support loop is compressed further.
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"The Intraocular Implant Lens Development and Results with Special Reference to the Binkhorst Lens", (Book) by M. E. Nordlohne, Second Edition, The Williams & Wilkins Company-Baltimore, 1975, pp. 14-20, the Barraquer Lens Shown in FIG. 4 on p. 16, Relied Upon.
"Clayman 7mm Ovoid One-Piece", Lens Model No. 5770 and 5772 UV, Advertisment Brochure by Precision Cosmet (1 p.), 1985.
Frinks Ronald L.
The Cooper Companies, Inc.
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