An erasable image forming material includes a color former containing crystal violet lactone, a developer, a first binder resin of styrene-butadiene copolymer and a second binder resin of a styrene-based resin containing \u03b1-methylstyrene, the first and second binder resins being in a compatible state. In one embodiment, each memory page is divided into relocation blocks located at various physical locations, and a relocation table is created with entries used to locate these blocks. Also provided are methods of diagnosing and treating multiple sclerosis and methods of monitoring treatment efficiency. The inner portion of each haptic element is permanently connected to the outer peripheral edge of the optic portion. Another embodiment uses a continuous wire or multiple wire construction formed into a table top to hold said skewers.