Boston Equalens II contact lenses from Polymer Technology are a good choice for patients with sensitive eyes.  They are made with materials that have a non-stick surface, ensuring that your eyes are kept comfortable and your sight crisp and clear.  Boston Equalens II contacts are gas permeable lenses made with a visible tint to help you locate your lenses in the solution.


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: 5.00 mm to 9.00 mm in .01 mm increments
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 0.25D increments
Center Thickness: 0.07 to 0.65 mm


Lens Properties  
Specific Gravity: 1.24
Refractive Index: 1.423
Wetting Angle: 34 degrees
Oxygen Permeability: 127* (85**)
{x 10-11 (cm3 O2 * cm)/(cm2 * sec * mmHg) @ 35 degrees C}
*gas to gas method
**Polographic Method (ISO/Fatt)

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