The present invention relates to a wearable device and a method for determining a position of at least one finger of a hand relative to a predetermined reference point comprising a sensor unit in the palm of the hand comprising at least one sensor, a logic unit in operative engagement with a computer device and configured to generate a position signal based on the registered finger position, and to interpret and convert the signal to a command to be processed by the computer device, a housing at least partly enclosing the sensor unit and an attachment member. The wearable device is characterized in that the sensor is at least one image sensor directed towards a respective distal end of the at least one finger and configured to determine the position of the finger in relation to the wearable device.