A hydraulic pump apparatus having an internal sump formed by a housing having an internal portion and an end cap secured to the housing. A toric multifocal contact lens of the invention has a central axis, an anterior surface having a first central optical zone, and an opposite posterior surface having a second central optical zone. The second element is disposed so that a p-polarization component reflected by the first element is reflected by the second element as an s-polarization component. The second computational block develops a complementary output binary digit that is a function of a weighted sum of a second set of input binary digits presented at the second set of binary inputs. The projection may be integrally molded with the adjusting screw. The method further includes applying a compensation voltage to a shield conductive line coupled to the bitline set in the floating state, and setting in the floating state a shield conductive line coupled to the bitline receiving the programming voltage.