An aqueous humor drainage device having an elongate structure that provides a fluid passageway for diverting aqueous humor from the anterior chamber of the eye. The method receives an input signal and amplifying the input signal to get an amplified signal. In a preferred embodiment, the landing zone of a magnetic disk is a laser texture zone comprising a great number of bumps and is positioned during landing adjacent an area other than the minimum fly height area of the headslider. Light is directed toward the first rotary table and the rotating ceramic component. The frame includes at least two plates for supporting the propellant tanks; at least one brace supporting the plates; and a cavity between two plates that accommodates a removable propellant tank. By measuring the coordinates of the cardinal points, the dynamic and long-term static behavior of the structure provide an indication of the health of the structure.