A probe that facilitates the creation of circumferential lesions in body tissue. At least some of the struts and some of the projecting elements comprise a biologically active material. A set of pleated grip strips may be disposed adjacent the closure elements to aid in opening a pouch. Then an output unit is provided to transmit the delayed shuttering signals to the liquid crystal shutter glasses. The interface port allows for communication of the stored results of the vision tests with external devices. The first peaks are formed downward using a mandrel received through windows interrupting the second ribs, the depressions being formed in corresponding notches in the first ribs.