Adding prisms

To add prisms, click on the Prisms button. This will display the prism rack as shown below.

To add a prism, click on the appropriate prism box and rotate the mouse wheel. The base direction is shown automatically.

The prism can be adjusted monocularly or binocularly by clicking on the button labelled Monoc / Binoc. When in binocular mode, the prisms for the right eye will be changed together in opposite directions so as to increase the combined prismatic power. For example, changing the horizontal prism will add Base In or Base Out prism to both eyes. For vertical prism, Base Up will be added to one eye and Base down to the other.

NOTE: The prism will not be incorporated into the phoropter until the Incorporate button is pressed. In addition to the button being highlighted, “PRISM INCORPORATED” is included on the visualisation as shown. This allows prisms to be incorporated instantly in front of both eyes if required.

The prism can be removed from the phoropter by pressing the Incorporate button again and the prism rack can be hidden by pressing the Prisms button again