Boston 7 contact lenses, manufactured by Polymer Technology, are gas permeable contacts made to the exact specifications of your prescription.  Offering clear vision with a high level of visual acuity, Boston 7 contact lenses are made with Polymer Technology’s patented oxygen permeable material that lets your eyes breath, keeping them safe, healthy and comfortable.


Lens Material
Boston 7 (satafocon A) contact lenses are available in spherical, aspherical, bifocal and toric designs and are manufactured from Boston 7 (satafocon A) contact lens material Boston Envision with Boston 7 aspherical contact lenses are also manufactured from Boston 7 (satafocon A) contact lens material.

Lens Parameters  
Diameter: 7.0 mm to 11.5 mm
Center Thickness: 0.07 to 0.65 mm
Base Curves: 5.00 mm to 9.00 mm in .01 mm increments
Powers: -20.00D to +20.00D in 0.25D increments


Lens Properties  
Specific Gravity: 1.22
Refractive Index: 1.428
Water Content: <1%
Oxygen Permeability: 73 (49.2) {x 10-11 (cm3 O2 * cm)/(cm2 * sec * mmHg) @ 35 degrees C}

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