Boston IV 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
Boston IV contact lenses are made of itafocon B.


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 0.25D increments
Center Thickness: 0.07 to 0.65 mm


Lens Properties  
Specific Gravity: 1.10
Refractive Index: 1.469
Wetting Angle: 17 degrees
Water Content: <1%

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