Patent ID: 7740355

Claim:
A device for determining optical parameters of a user having at least two image recording units configured and arranged to generate image data of at least sub-sections of the head of the user; a data processing unit having a user data determination unit configured to determine user data of at least one sub-section of the head or at least one sub-section of a system of the head and a pair of spectacles of the user situated thereon in the wearing position on the basis of the generated image data, the user data comprising location information in the three-dimensional space of predetermined points of the sub-section of the head or of the sub-section of the system and a parameter determination unit configured to determine at least one part of the optical parameters of the user on the basis of the user data; a data output unit configured to output at least one part of the determined optical parameters of the user; wherein, in an operating position, the image recording units are situated inside a spatial area which is enclosed by a cone having a predetermined aperture angle of less than 90°, and apex of the cone being situated in the surroundings of a predetermined reference point and an axis of the cone being situated parallel to a predetermined operation direction, the zero viewing direction of the user corresponding to the predetermined operation direction.