Lens for increased depth of focus

Details Lens for increased depth of focus Lens for increased depth of focus

A - Human Necessities

61

F

A61F 2/16 (2006.01)

Patent

CA 2558866

An intraocular lens (14) provides substantially increased depth of focus for accurate near and far vision with an optic (18) much thinner than a natural lens, and the lens being rigid vaulted posteriorly and adapted for posterior positioning in the capsular bag. The optic is positioned substantially farther from the cornea than a natural lens, so that a cone of light exiting the optic to impinge upon the retina is much smaller than a cone of light from a natural lens. Typically, the optic may be about 1.0 mm thick and its distance from the cornea 7.0-8.0 mm.

Cette invention concerne une lentille (14) intranucléaire dont la profondeur de champ sensiblement accrue permet une vision proche et lointaine nette, ceci avec une optique (18) beaucoup plus mince qu'une optique naturelle, ladite lentille étant bombée rigide postérieurement et conçue pour un positionnement postérieur dans le sac capsulaire. L'optique est sensiblement plus éloignée de la cornée qu'une lentille naturelle de sorte qu'un cône du lumière sortant de cette optique pour aller frapper la rétine est nettement plus petit qu'un cône de lumière sortant d'une lentille naturelle. De façon générale, l'optique mesure environ 1,0 mm d'épaisseur et se trouve à 7,0-8,0 mm de la cornée.

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