A method of fabricating holographic colored contact lens is provided. Windings of the transformers are driven with an excitation waveform whereupon signals are responsively detected, which indicate a health of the battery. Housing and valve member cooperate in the open position to provide an annular flow path that does not require the fluid flow direction to substantially change while flowing from inlet to outlet. A ventilating passage is provided for allowing air to exit and enter the compartment when washing fluid enters and exits the compartment, respectively.