Boston II contact lenses from Polymer Technology are easy to take care of because they are made from patented oxygen permeable material that allows your eyes to breathe.  Gas permeable lenses are made to your prescription specifications, making them effective for patients who have special eye needs.


Lens Material
The Boston Equalens II Rigid Gas Permeable Contact Lens material, oprifocon A, for daily wear or extended wear is composed of methyl-methacrylatefluoroitaconate-siloxanyl copolymer with or without an ultraviolet absorber (Uvinul D-49). The lenses are available in clear (untinted) or blue. The tinted lenses contain the color additive D & C Green No. 6.

Lens Parameters  
Base Curve: 5.0 – 9.0 nm
Diameter: 7.0 mm to 11.5 mm
Power Range: -20.00D to +20.00D (daily wear)
  -20.00D to +12.00D (extended wear) in 0.25Dincrements
Center Thickness: 0.07 to 0.65 mm


Lens Properties
Specific Gravity: 1.13
Refractive Index: 1.471
Wetting Angle: 20 degrees
Water Content: <1%

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