Abstract: A method for controlling a movable resistance element belonging to a training device. The resistance element is influenced by a user with a muscular force. A device is adapted to generate a reference signal for controlling a power conversion device coupled to and controlling a movable resistance element belonging to a training device, and which is influenced by a user with a muscular force. A computer program for carrying out the method and a use of the device.

Abstract: A device for filming a dimly illuminated object, especially the eye, comprises a source of light for illuminating the object/eye, a light amplifier for amplifying the light reflected from the object/eye, and filming picture recording equipment. The source of light is a source of white light with a low intensity of the emitted light. The device comprises elements for separating at least two of the three primary colors from the reelected light, a light amplifier for amplifying the light for each separated primary color, and filming picture recording equipment for recording the amplified light for each separated primary color. A method for filming the object/eye can be carried out by means of the device.