Gas Permeable (GP) Lens Materials

Boston XO® & Boston XO2®

Balance of properties defined

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Boston XO® and Boston XO2® are formulated to meet the demands for high oxygen delivery, without compromising lens design performance requirements and surface wetting characteristics.

These materials can be made into a wide range of special designs for demanding visual needs, including:

  • Spherical and aspherical contact lenses for myopia and hyperopia, and irregular corneal conditions, such as keratoconus
  • Bifocal contact lenses for presbyopia
  • Toric lenses to correct astigmatism in non-aphakic and aphakic patients
  • Scleral lenses for use in patients with ocular surface disease, such as dry eye

Additional offerings:

  • Standard and large diameters (up to 21 mm)
  • Available with Tangible® Hydra-PEG® coating technology for enhanced lens wettability
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Boston XO® Patient Information Booklet and Package Insert Boston XO® Patient Information Booklet and Package Insert (French) Boston XO2® Patient Information Booklet and Package Insert Boston XO2® Patient Information Booklet and Package Insert (French) Boston XO® Professional Fitting Information Boston XO2® Professional Fitting Information

Trust in Boston XO® and Boston XO2®

Available in a range of handling tints

Boston XO® Dk 100 • Boston XO2® Dk 141 ISO/Fatt*

*ISO/Fatt Method: Dk Units = x 10-11 (cm3 O2 cm) / (cm2 sec mmHg) @ 35°C
(see package inserts: Boston XO®, Boston XO2®).

Learn more about the materials

Boston® Equalens® II
Boston EO®/Boston ES® II

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).