Capsular tension ring, method for making a capsular tension...

A - Human Necessities – 61 – F

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A61F 2/16 (2006.01)

Patent

CA 2512606

The invention concerns a capsular tension ring implantable in the equatorial region of a capsular bag after cataract ablation comprising an open or closed annular body and including sharp edges and an axial width ranging between about 0.3 and 0.6 mm, or preferably about 0.5 mm. The annular body of the capsular tension ring, including the sharp edges, is made of a rigid material for the major part of the circumference, and comprises at least one joint made of flexible material between two segments of the annular body made of rigid material. The invention also concerns an assembly comprising a capsular tension ring and an intraocular implant of the type including a central optical part and a peripheral haptic part comprising one or several haptic elements extending radially from the optical part, the optical part having a peripheral edge with a sharp ridge on its rear surface. Such an implantable capsular tension ring is prepared by chemical modification either of the segments of the annular body made of rigid material, from a flexible material, or the joints made of rigid material from a flexible material.

Un anneau capsulaire implantable dans la région équatoriale d'un sac capsulaire après ablation de la cataracte comprend un corps annulaire ouvert ou fermé et a des arêtes vives et une largeur axiale comprise entre environ 0,3 et 0,6 mm, ou de préférence environ 0,5 mm. Le corps annulaire, de l'anneau capsulaire, y compris les arêtes vives, est réalisé en matériau rigide sur la majorité de la circonférence, et comporte au moins une jonction en matériau souple entre deux segments du corps annulaire en matériau rigide. Il est également pourvu un ensemble comprenant un anneau capsulaire et un implant intraoculaire du type comportant une partie optique centrale et une partie haptique périphérique comportant un ou plusieurs éléments haptiques s'étendant radialement à partir de la partie optique, la partie optique ayant un bord périphérique avec une arête vive sur sa face postérieure. Un tel anneau capsulaire implantable est préparé par modification chimique soit des segments du corps annulaire en matériau rigide, à partir de matériau souple, soit les jonctions en matériau rigide à partir du matériau souple.

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