Gas Permeable (GP) Lens Material

Boston® Equalens® II

FDA-approved overnight Ortho-K lens material

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The original Boston® Equalens® II material FDA-approved for overnight Ortho-K lens wear, plus:

  • Exclusively used with Bausch + Lomb Vision Shaping Treatment VST® designs
  • Comes with exceptional service and support
Package Insert and Patient Care Guide Professional Fitting Information TAKE ME TO VST®

See the material in action

Available in green, yellow, red, and blue handling tints

Boston® Equalens® II Dk 85 ISO/Fatt*

*ISO/Fatt Method: Dk Units = x 10-11 (cm3 O2 cm) / (cm2 sec mmHg) @ 35°C (see package inserts).

Learn more about the materials

Boston XO® & Boston XO2®
Boston EO®/Boston ES®

The Boston® GP Lens Materials Guarantee

If you are not completely satisfied with any Boston® GP lens, you may exchange it for any other Boston® GP lens material.*

*THE BOSTON® GP LENS MATERIALS GUARANTEE IS AVAILABLE THROUGH PARTICIPATING AUTHORIZED BOSTON® MANUFACTURERS AND IS SUBJECT TO THE FOLLOWING TERMS AND CONDITIONS:

  1. The guarantee warrants against any Boston® lens material dissatisfaction related to wetting or breakability, and not lens design, for six months from the date the finished lens was dispensed.
  2. Under this guarantee, a Boston® lens can be exchanged only for another Boston® lens of the same parameters. Any add-ons, treatments or coatings are not included.
  3. Replacement of the same or other Boston® lens material will be shipped from the participating Authorized Boston® Manufacturer at published price. Credit for returned lens will be issued upon receipt of the returned lens accompanied by a copy of the original invoice. (Contact your Authorized Boston® Manufacturer for further details).