Variable power intraocular lens with astigmatism correction

Details Variable power intraocular lens with astigmatism correction Variable power intraocular lens with astigmatism correction

A - Human Necessities

61

F

A61F 2/16 (2006.01) G02B 3/14 (2006.01)

Patent

CA 2067247

2067247 9203989 PCTABS00011 An intraocular lens has a flexible lens body (34) formed from optically clear material surrounded by an outer ring (36) which is sensitive to an external force. Utilizing the external force, the shape of the outer ring (36) can be changed to elongate the lens body (34) along an axis for correcting astigmatism, or to change the lens power by altering the lens's spherical shape or curvature. Attached to one of the lens body (34) and the ring (36) are actuator bodies (38) of ferromagnetic material. An adjustable focus lens apparatus includes a transparent lens body (34) and a rigid outer ring (40) extending about the lens body periphery and micromotor devices (38) spaced equally about and coupled between the ring (40) and the periphery (34). Each micromotor device (38) is responsive to an externally generated control signal for selectively changing the circumference and/or axial position of an association portion of the periphery to adjust the lens for power and astigmatism correction.

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