The TRS 5100 benefits from Marco’s latest generation of electronic refraction technology. Replacing the standard refractor, it allows us to control the entire refraction process from a keypad. This keypad also controls the M&S Automatic Chart Projector. And because the TRS 5100 is completely programmable, all the lenses are moved at the touch of a button, taking us to each new refraction step in more efficient and accurate way.