When the Phoropter module is enabled, the Phoropter Interface is shown alongside a thumbnail image of the Test Chart as shown below.




This interface gives simultaneous control over the Test Chart and the Phoropter. The Phoropter interface will scale automatically as the Control window is resized.  The relative sizes of the Phoropter interface and the Test Chart control panel can be changed by dragging the border between them.


The focus will automatically shift between the Phoropter module and the Test Chart module as the mouse cursor is moved to the corresponding part of the Control screen.  The keyboard and IR remote control will control the Test Chart in the normal way.