Plastic Prism Bars
Suitable for the rapid assessment of the angle of deviation for both distance and near vision, by the prism and cover test. The bars may also be used for the measurement of fusional reserves and vergence exercises. Both horizontal and vertical bars contain 16 prisms mounted between two aluminum channels which help to prevent the surfaces becoming scratched. Optically polished to very close tolerances, the surfaces have excellent distortion free viewing.
Power range as follows:
Horizontal; 1,2,4,6,8,10,12,14,16,18,20,25,30,35,40,45
Vertical; 1,2,3,4,5,6,7,8,9,10,11,12,14,16,18,20
Solid Prism Bars
Similar to the above prism bars but manufactured in a solid, one piece, bar of plastic.
Power range as follows:
Horizontal; 1,2,4,6,10,12,14,16,18,20,25,30,35,40, plus an additional loose 45 prism
Vertical; 1,2,3,4,5,6,8,10,12,14,16,18,20,25, plus an additional 30 loose prism.
Available as individual bars or as a pair in a case.
