37mm square loose prism sets and your choice of metal or wooden boxes
Designed to be used in diagnoses of Strabismus.
The standard prism bars come with feet on the back so the back surface is not scratched when placed on a table. The ‘no feet’ versions permit the use of the bars ‘back to back’ in order to show simultaneous horizontal and vertical adjustment to the patient.
37 mm square loose prism sets and your choice of metal or wooden boxes