Far and near phoria card set to measure horizontal and vertical free space phoria.
Accurate measurement technique uses vertical prism dissociation.
VTE version uses dissociation by red prism it allows cancellation of the coloured dissociated stripe and arrow only. It doesn’t make confusion to the patient. (See photo 5, 6)
Set comes with:
1 x 8 Pd red prism with handle;
4 plastic coated targets to use for the following distance:
1 X 3M vertical phoria (photo 3);
1 x 3M horizontal phoria (photo 2);
1 X 40Cm. horizontal phoria (photo 4);
1 x 60Cm. horizontal phoria