Hand held device and methods for examining a patient's retina

Details Hand held device and methods for examining a patient's retina Hand held device and methods for examining a patient's retina

A - Human Necessities

61

B

A61B 3/10 (2006.01)

Patent

CA 2596912

A hand held device for examining a patient's retina. In one example, the device generates visible or non-visible illuminating beams having desired spectral content. The illuminating beams are then polarized to generate polarized light beam(s) that are directed towards the patient's retina. At the patient's eye, a portion of the polarized beam is partially reflected by the cornea and travels back to the device, and another portion of the polarized beam enters the eye through the undilated pupil, illuminates the patient's retina, and generates a reflected retinal image (generally de-polarized) which also travels back to the device. The device receives the retinal image and transmits certain portions of the retinal image on through to an image detector (i.e., CCD or CMOS); and the device deflects the received polarized corneal reflections away from the image capture device.

Dispositif à tenue manuelle pour examen de la rétine. Selon un exemple, ce dispositif émet des rayons lumineux visibles et non visibles à la teneur spectrale requise. Les faisceaux lumineux sont ensuite polarisés en faisceaux lumineux polarisés qui sont dirigés sur la rétine du patient. Au niveau de l'oeil, une partie du faisceau polarisé est partiellement réfléchie par la cornée et retourne au dispositif. Une autre partie du faisceau pénètre dans l'oeil par la pupille non dilatée, éclaire la rétine dont il produit une image réfléchie (et généralement dépolarisée) qui retourne elle aussi au dispositif. Le dispositif reçoit l'image rétinienne dont il transmet certaines portions à un détecteur d'images (de type CCD ou CMOS par exemple). Le dispositif dévie les réflexions cornéennes polarisées à l'écart du dispositif de capture d'images.

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