Boston® Gas Permeable (GP) Lens Materials

See the materials that make possibilities

GP lens materials can be made into a wide variety of special designs for demanding visual needs.

Eye conditions that are suited for GP lenses include:

  • Astigmatism
  • Hyperopia (farsightedness)
  • Presbyopia
  • Irregular Cornea
  • Myopia
  • Keratoconus
  • Ocular Surface Disease, including dry eye*

*Scleral lenses in Boston XO® and Boston XO2® materials are indicated for use in ocular surface disease, including dry eye.

Available with Tangible® Hydra-PEG® coating

Scleral lenses in Boston XO® and Boston XO2® materials are indicated for use in ocular surface disease

Material Name Material Type DK ISO/Fatt†
Boston XO2® Fluoro silicone
acrylate		 141
Boston XO® 100
Boston EO® 58
Boston ES® 18

  • Boston XO2®

    Material Type Fluoro silicone acrylate

    DK ISO/Fatt† 141

  • Boston XO®

    Material Type Fluoro silicone acrylate

    DK ISO/Fatt† 100

  • Boston EO®

    Material Type Fluoro silicone acrylate

    DK ISO/Fatt† 58

  • Boston ES®

    Material Type Fluoro silicone acrylate

    DK ISO/Fatt† 18

FDA-approved overnight Ortho-K lens material

Exclusive to Bausch + Lomb Vision Shaping Treatment VST®

Material Name Material Type DK ISO/Fatt†
Boston® Equalens® II Fluoro silicone
acrylate		 85

  • Boston® Equalens® II

    Material Type Fluoro silicone acrylate

    DK ISO/Fatt† 85

†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 XO®/Boston XO2®
Boston® Equalens® II
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).