A liquid crystal optical device includes a liquid crystal optical unit and a drive unit. In the method, a touch input for a set region is detected, so that a mode is switched to a setting change mode for changing a stored setting value. Upon receiving the AIS frames, the MEP nodes are operable generate another AIS frame for propagating to an adjacent higher level second OAM domain. A statistical approach may be used to evaluate each term in the candidate list to determine a measure of how monosemous each remaining candidate term is, i. The support element can be positioned andor displaced in relation to the tappet.