A method of constructing devices using semiconductor manufacturing processes includes fabricating a device having a movable portion and a fixed portion. With respect to horizontal and vertical shift pulses which are supplied from the timing generator and drive horizontal and vertical shift registers of the 2-dimensional solid state image pickup sensor, periods of the horizontal shift pulses andor the vertical shift pulses are made variable. a luminescence biosensor, comprising a multi-layer structure. Processes are performed on the image data with a plurality of filters for detecting dots corresponding to a plurality of inclinations to calculate the degrees of agreement between the data and the filters. An input corresponding to a focused line pattern variance selected by the user is then received, and a refractive error is quantified based on the input and an approximate distance between the line pattern and the user. The foldable rescue stretcher includes a rigid supporting frame having a plurality of sections, a protective barrier, and an inflatable collar.