Abstract: The invention is directed to an arrangement for determining the pupil center of an eye of a person in an image. The arrangement includes a touch-sensitive display device for displaying the image with the eye of the person and a gesture recognition unit for recognizing a first predetermined gesture in response to a touching of the touch-sensitive display device by a user. The gesture recognition unit is configured to recognize, as a first predetermined gesture, a movement of two fingers at a distance (D) to each other touching the touch-sensitive display and carrying out an orbital rotational movement about a common rotation center. A contrast changing unit changes the contrast of the image displayed on the touch-sensitive display device in response to the user touching the touch-sensitive display device in a manner recognized as the first predetermined gesture by the gesture recognition unit.

Abstract: In a method for determining at least one fitting parameter for a spectacle lens received in a spectacle frame, an image, lying in an image plane, of at least one portion of a spectacle frame worn by a subject is acquired. When acquiring the image, the inclination of the image plane about a horizontal axis which is parallel to the image plane is established and, in the process, the at least one fitting parameter is established from the acquired image of the portion of the subject with the spectacle frame worn by the subject and the established inclination of the image.

Abstract: The invention is directed to a method allowing the exact determination of the far visual point on spectacle lenses in a spectacle frame for a subject while taking into account the habitual head position or body posture. The method renders it possible to specify the coordinates of the far visual point on spectacle lenses in a coordinate system that is fixed in relation to the spectacle frame coordinate system. The invention also relates to a system carrying out the method.

Abstract: The invention is directed to an arrangement for determining the pupil center of an eye of a person in an image. The arrangement includes a touch-sensitive display device for displaying the image with the eye of the person and a gesture recognition unit for recognizing a first predetermined gesture in response to a touching of the touch-sensitive display device by a user. The gesture recognition unit is configured to recognize, as a first predetermined gesture, a movement of two fingers at a distance (D) to each other touching the touch-sensitive display and carrying out an orbital rotational movement about a common rotation center. A contrast changing unit changes the contrast of the image displayed on the touch-sensitive display device in response to the user touching the touch-sensitive display device in a manner recognized as the first predetermined gesture by the gesture recognition unit.

Abstract: The invention is directed to a method allowing the exact determination of the far visual point on spectacle lenses in a spectacle frame for a subject while taking into account the habitual head position or body posture. The method renders it possible to specify the coordinates of the far visual point on spectacle lenses in a coordinate system that is fixed in relation to the spectacle frame coordinate system. The invention also relates to a system carrying out the method.

Abstract: In a method for determining at least one fitting parameter for a spectacle lens received in a spectacle frame, an image, lying in an image plane, of at least one portion of a spectacle frame worn by a subject is acquired. When acquiring the image, the inclination of the image plane about a horizontal axis which is parallel to the image plane is established and, in the process, the at least one fitting parameter is established from the acquired image of the portion of the subject with the spectacle frame worn by the subject and the established inclination of the image.