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OptiCampus Optical Calculators
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Lens Tilt & Wrap
Crossed Cylinders
Vertex Distance
Spectacle Magnification
Lens Thickness
Vertical Imbalance
Single Vision Blank Size
Compounding Prisms
Resolving Prisms
Induced Prism
Surface Curve
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Vertical Imbalance Compensation

Fill in the input fields and then press the Calculate button in order to compute the resultant vertical prism imbalance at the reading level. The amount of base up prism compensation to correct this imbalance is then displayed for slab-off or a similar correction.

Vertical Imbalance Compensation Form

Right Sphere Power (D)?
Right Cylinder Power (D)?
Right Cylinder Axis (°)?
Left Sphere Power (D)?
Left Cylinder Power (D)?
Left Cylinder Axis (°)?
Reading Level Distance (mm)?
 
Prism Compensation (Δ):
0.00, ---