Vergence Facility Prism for Distance (6D Base-Out/2D Base-In)

Item #: VFP26

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Vergence Facility Prism for Distance

A good binocular screening device. Performed at a distance of 6 meters (20 feet) with a target of 20/30. Most normal patients can cycle between these prims 15/minute. Those with difficulty should be more thoroughly tested.

6D Base-Out and 2D Base-In.

Prism is 1.5 inches square.