An apparatus is provided, wherein the apparatus comprises a medical apparatus (1； 41) having an elongate body, a distal extremity (5； 42) having at least two optical fiber sensors (7) configured to deform responsive to contact forces, and a deflection mechanism configured to deflect the elongate body at a location proximal of the distal extremity (5； 42), and a processing logic (6) programmed to compute at least a two-dimensional force vector responsive to detected changes in the optical characteristics of the optical fiber.
