A 3D measuring apparatus includes a probe that has a spherical gauge head for measuring a measured object; a motion mechanism that holds and moves the probe; and a motion controller that controls the motion mechanism. To form the active matrix substrate five masks are needed. This allows testing of the network without use of a bypass pair or the need to interface the digital loop carrier network with the pair gain test controller. The first cavity, the second cavity and the third cavity are shaped so as to be complimentary in shape of the syringe. Upon a real-time determination that the feedback criterion is satisfied, visual feedback can be caused to be presented to the user in real-time. Embodiments of the adhesive compositions, when cured, are optically clear and resistant to heat and moisture.