A method and apparatus are provided for characterizing square wave jerks in the eye movements of a person, which may provide a powerful tool in the differential diagnosis of oculomotor and neurological disease. The method includes applying a program checking tool to the computer program to produce one or more warnings, mapping one of the warnings into an annotation modification, and modifying the computer program in accordance with the annotation modification. Tailoring for sufficient drive can be achieved either by varying the size or number of circuit components or by adjusting the threshold voltage of circuit elements, or by doing both. Transparent regions are formed next to the respective sub pixels of the front display device. Timing characteristics of each tiling variant of each characterization memory are stored in the memory timing database for the memory resource based on sets of input ramptimes and output loads. A lubricant-conveying member is disposed in the housing and has an upper segment and one or more lower segments and one or more middle segments coupled between the upper segment and the lower segments for absorbing the lubricant even when the lubricant is below a lower level and even when the housing is tilted or turned up side down relative to the slider and the guide rail.