Abstract: A method and means for interfacing between an application and a database to facilitate graphical charting of selected data included in the database. The selected data can be representative of a quantitative relationship between two or more sets of values. A programming layer can be generated to receive indications from a user of which data will be charted and create a programming statement to retrieve and chart the indicated data. A chart is graphed according to the retrieved data. In some embodiments, a user can select values to plot from pre-defined groups of data that have been created to organize available data into logical categories meaningful to a user.

Abstract: An apparatus for maintaining intra-ocular pressure while simultaneously removing and replacing fluid in a patient's eye, for example, during cataract surgery, includes a pair of cooperating expansible bodies connected via fluid conduits to the eye. The expansible bodies may be piston/cylinder assemblies such as syringes. The plungers and/or the barrels of the syringes are mechanically linked together for equal and opposite operation of the two syringes, whereby input and output flow are precisely equal. The syringes are preferably placed back to back along a common axis. The barrels are rigidly spaced and a drive means is applied between the spaced barrels and the endwise-connected plungers.