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} |