Spectacle Magnification

The Spectacle Magnification calculator allows you adjust certain lens parameters to change the magnification difference between the two lenses, to overcome the effects of aniseikonia.

Enter the lens parameters below. Adjust the values to calculate the Magnification Difference. To be effective you will want to keep the magnification difference less than 10%.


Lens Parameters Right Left     To Increase Magnification     To Decrease Magnification
Sphere     More Plus     More Minus
Cylinder     More Plus     More Minus
Lens Thickness     Increase Thickness     Decrease Thickness
Vertex Distance     Increase the Distance     Decrease the Distance
Index of Refraction     Increase the Index of Refraction     Decrease the Index of Refraction
Front Base Curve     Increase the Base Curve (Steeper)     Decrease the Base Curve (Flatter)
 
Magnification (Sphere) 1.008 1.008  
Magnification (Cylinder) 1.008 1.008  

Sphere

 Right 1.008 0.8% increase in retinal image size

Sphere 0.8% Magnification Difference
Left 1.008 0.8% increase in retinal image size
 

Cylinder

 Right 1.008 0.8% increase in retinal image size

Cylinder 0.8% Magnification Difference
Left 1.008 0.8% increase in retinal image size