Spectacle-frame method for preparing a user-dependent adjustment to spectacle frames measures the angle of tilt for a user's/wearer's head during a sequence of vision calibration

摘要

During a sequence of vision calibration, the angle of tilt is measured for a user's head and a number of values for this angle of tilt are recorded. A zero-view head tilt is determined from the recorded values for this angle of head tilt. Main direction of vision is calculated for distance by using a user's/wearer's detected zero-vision head tilt and head size. With the help of a video centering device (14), the position of a wearer's eyes is measured in relation to spectacle frames (2) when the wearer's zero-vision head tilt has been adjusted in advance. An independent claim is also included for a device for preparing a user-dependent adjustment to spectacle frames.