Intraocular implant for correcting short-sightedness

Details Intraocular implant for correcting short-sightedness Intraocular implant for correcting short-sightedness

A - Human Necessities

61

F

A61F 2/16 (2006.01)

Patent

CA 2246764

A posterior-chamber intraocular implant for correcting short-sightedness in a phakic eye is disclosed. The implant includes a substantially circular optical portion (30) consisting of a front dioptric surface (40), a rear dioptric surface (42) and a haptic portion. The haptic portion includes two extensions (32, 34) joined to the edge of the optical portion, of which the ends are spaced apart by a distance greater than the diameter of a dilated pupil, and two attachment portions (52, 54). The front surface of each extension comprises a toroidal portion (44) joined to the front dioptric surface, the rear surface of each extension comprises a toroidal portion (46) engaging the lens circumference and joined to the rear dioptric surface, and a connecting portion (48), and the rear dioptric surface and the toroidal portions on the rear surfaces of the extensions define a recess (50) for freely altering the curvature of the front lens surface.

L'invention concerne un implant intraoculaire de chambre postérieure pour la correction de la myopie d'une oeil phake. Il comprend une partie optique (30) sensiblement circulaire limitée par un dioptre antérieur (40) et un dioptre postérieur (42) et une partie haptique. La partie haptique comprend deux extensions (32, 34) raccordées à la périphérie de la partie optique dont les extrémités sont séparées par une distance supérieure au diamètre d'une pupille dilatée et deux éléments de fixation (52, 54), la face antérieure de chaque extension comportant une portion torique (44) raccordée au dioptre antérieur, la face postérieure de chaque extension comprenant une portion torique (46) d'appui sur la périphérie du cristallin raccordée au dioptre postérieur et une portion de raccordement (48), le dioptre postérieur et les portions toriques de la face postérieure des extensions définissant un évidemment (50) pour permettre la libre modification de la courbure de la face antérieure du cristallin.

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