This set comes with a horizontal and a vertical prism bar in a foam-lined storage case.

The bars feature the following diopters

• Horizontal: 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45 PD
• Vertical: 1, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 25, 30 PD

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.