A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 3/103 (2006.01)
Patent
CA 2471037
A wavefront-sensing device for measuring ocular aberrations includes, among other things, a retinal illumination component and a wavefront imaging component (e.g., a microlens array for a Shack-Hartmann wavefront sensor). The retinal illumination component includes a laser source and a fixed collimating lens. In one embodiment, an improved device has a beam path between the retinal illumination component and the patient's eye containing no refracting, diffracting, or phase altering components for focusing the illumination beam on the retina. In another embodiment, the retinal illumination component provides a beam having a diameter on the retina that is smaller than the diffraction limit of the wavefront imaging component over a refractive focus range of the patient's eye of between about -12D to +6D.
L'invention concerne un dispositif de détection de front d'onde permettant de mesurer les aberrations oculaires, qui comprend, entre autres, un premier élément d'éclairage de la rétine et un second élément d'imagerie de front d'onde (par exemple, réseau de microlentilles pour capteur de front d'onde de Shack-Hartmann). Le premier élément comporte une source laser et une lentille collimatrice fixe. Selon une variante, l'invention concerne un dispositif amélioré ayant un trajet de faisceau établi entre le premier élément et l'oeil du patient, sans composantes de réfraction, de diffraction ou de modification de phase, pour la concentration du faisceau d'éclairage sur la rétine. Selon une autre variante, le premier élément fournit un faisceau dont le diamètre sur la rétine est inférieur à la limite de diffraction de l'élément d'imagerie de front d'onde, dans une gamme de foyers de réfraction de l'oeil du patient comprise entre environ -12D et +6D.
Kearney Kevin
Martino Ronald J.
Prelewitz David F.
Bausch & Lomb Incorporated
Borden Ladner Gervais Llp
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