The invention described herein provides computer-implemented methods and systems for alleviating an abnormal behavior, such as a behavior associated with a fear, abnormal activity, or obsession. The first memory is configured to store instruction bytes of a fetch window and to store first predecode information and first branch information that characterizes the instruction bytes of the fetch window. Each lens element has a centered, rotationally symmetric characteristic so the overall assembly has a corresponding characteristic. The intermediate land is positioned between the first end land and the second end land in a spaced-apart, axially aligned relationship such that a first annular space is defined between the first end land and the first side of the intermediate land and a second annular space is defined between the second end land and the second side of the intermediate land.