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Used to change the width and range of an eye. The more degrees that you see, the less range you have. 0/-1256 is the normal 10 degrees, 1220/-35 is 360 degrees, and -34 is a long skinny wisker.

BTW For some reason, when you store 1222-1255, your eye is really really short and skinny, then pops up to normal 10 degrees at 1256.