The present invention relates generally to a device and method for the treatment of, ocular hypertension, glaucoma, and increasing the amplitude of accommodation. At least one of said rails at each of its ends bears a closure end piece to which a first end of a flexible or semi rigid first element is secured, the second end of which element is intended to be secured to said structure. A prepit detector detects a prepit signal from prepits of the optical disk. The system can select either automatic-extraction mode or manual-extraction mode for extracting the marker in live images, so that the markers can be extracted with a high degree of accuracy under all conditions to obtain the position and orientation parameters of the camera. The two front wheels are respectively connected to two ends of the cross bar through a bearing at the top ends of a front fork. The server may filter out these false positives before returning search results.