Corneal implant

Details Corneal implant Corneal implant

A - Human Necessities

61

F

A61F 2/16 (2006.01)

Patent

CA 2595034

Prosthetic implants (94) designed to be implanted in the cornea for modifying the cornea curvature, altering the corneal refractive power for correcting myopia, hyperopia, astigmatism, presbyopia, and, in addition, such implants (94) formed of a micro-porous hydrogel material. Particularly, the invention provides a corneal implant, comprising: a) a body formed of an optically clear, biocompatible material having inner and outer surfaces and an index of refraction substantially the same as that of corneal tissue; b) the body being solid and formed with a central power add on the outer surface for increasing the diopter power of the body in the central portion for correcting presbyopia, the central power add having a diameter between about 1 mm to about 3.5 mm; c) the central power add having a relatively steep transition from the outer surface of the body for providing a relatively sharp change of power from the central power add to the body.

L'invention porte sur un appareil et une méthode permettant de calculer la valeur approximative du volume d'éjection systolique et le débit cardiaque d'une personne. L'appareil et la méthode font appel à la mesure de l'impédance ou de l'admittance électrique d'une partie du corps, soit le thorax. Cette partie anatomique a été choisie, car son impédance ou son admittance électrique, varie avec le temps en raison des battements réguliers du coeur. C'est la raison pour laquelle la mesure de l'admittance ou de l'impédance peut fournir des données sur l'efficacité du coeur, en tant que pompe.

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