An apparatus for passive alignment of optical devices comprises a substrate including a trench in a top surface thereof, where the trench has a first end positioned at an edge of the substrate and a second end positioned at an interior region of the substrate, and a lens disposed on the top surface of the substrate adjacent to the second end of the trench. The hydraulic drive for the lifting and lowering mechanism is capable of moving the platen to any precise vertical position and maintaining same at that position before, during and after press operations. The capsule facilitates the performance of endoscopic procedures providing a space in which to manipulate medical instruments within the patient body as well as improving a surgeon’s field of vision within the patient body. According to the action direction of a finger on a multidirectional key, a function term is selected to input. The microelectronic devices can include a series of row and columns and are used to store data at their intersection. The apparatus 10 includes a suppressor 110, which, during an aspiration mode of operation, maintains a fluid flow rate at 50 ccmin, and, upon an occlusion breaking free, dynamically decreases the fluid flow rate from a high surge rate to the rate at 50 ccmin.