Intraocular lenses

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/16 (2006.01)

Patent

CA 2370865

A refractive intraocular lens (32) including an optic portion (34) having an outer peripheral (36) edge and two opposed looped haptic elements (38). Each looped haptic element (38) is formed to have two broad connecting portions (40), two radial orientation portions (42), two spring portions (44) and a linking portion (46) for supporting the optic portion (34) in a patient's eye (10). The two broad connecting portions (40) of each looped haptic element (38) is permanently connected to the outer peripheral edge (36) of the optic portion (34). Each looped haptic element (38) is likewise formed to have greater resistance to bending in a plane generally parallel to an eye's optical axis than in a plane generally perpendicular to the eye's optical axis. The intraocular lens (32) is so designed to exhibit less than approximately 1.0 mm axial displacement or tilting of the optic portion (34) along the eye's optical axis under a compression force suitable to effect a 1.0 mm in diameter compression in overall length of the intraocular lens (32).

L'invention concerne une lentille intraoculaire réfractive (32) qui comprend une partie optique (34) comportant un bord périphérique extérieur (36) et deux éléments haptiques opposés en boucle (38). Chacun des éléments haptiques opposés en boucle (38) est formé en sorte qu'il possède deux larges parties de raccord (40), deux parties radiales d'orientation (42), deux parties élastiques (44) et une partie de liaison (46) pour soutenir la partie optique (34) dans un oeil (10) du patient. Les deux larges parties de raccord (40) de chacun des éléments haptiques (38) sont reliées en permanence au bord périphérique extérieur (36) de la partie optique (34). De façon similaire, chacun des éléments haptiques (38) est formé de manière à avoir une plus grande résistance au pliage dans un plan généralement parallèle à un axe optique de l'oeil que dans un plan généralement perpendiculaire à un axe optique de l'oeil. La lentille intraoculaire (32) est conçue pour manifester moins de 1,0 mm de déplacement axial ou d'inclinaison de la partie optique (34) le long de l'axe optique de l'oeil sous l'effet d'une force de compression suffisante pour provoquer une compression diamétrale de 1,0 mm de la longueur globale de la lentille intraoculaire (32).

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