Back Vertex Distance Compensator by

ORIGINAL Rx

R:

L:

Original BVD:
mm
New BVD:
mm
COMPENSATED Rx

R:

L:



What is This?

This online calculator provides a simple method to adjust a lens power when changes are made to the vertex distance of an optical lens. This adjustment is commonly carried out by an optician when calculating the power of a contact lens, given the spectacle lens prescription.

Type any valid spectacle Rx into the input boxes provided, and the compensated Rx will appear below.

Cookies and Adverts

We use cookies to personalise ads displayed on this site and to analyse our traffic. We also share information about your use of our site with our advertising and analytics partners. Read More.

More Information

The jQuery plugin used to power this site is hosted at GitHub


  1. Hello and welcome to the Joyride
    documentation page.