Torisoft contact lenses from CIBA Vision are designed for patients suffering from astigmatism. They are worn as daily wear lenses for up to a year and replaced. The double thin zone design of the Torisoft contact lens uses a lid-lens interaction to keep lenses properly oriented and the lenses are positioned under the eye lids easily and comfortably.
Lens Material
The lens material is 37.5% water and 62.5% tefilicon. The lens material, tefilcon, is a hydrophilic polymer of hydroxyethylmethacrylate.
| Lens Parameters | |
| Chord Diameter: | 14.5mm |
| Center Thickness: | 0.095mm at -3.00D |
| Base Curves: | 8.6mm, 8.9mm |
| Power: | -6.00D to +4.00D, 0.25 steps |
| -6.50D & -7.00D | |
| -1.00, -1.75 cyl., full circle in 10 deg. steps, all base curves | |
| -2.50 cyl., 10 deg. steps 180 +/- 20 deg. | |
| 90 +/- 20 deg., 8.6 & 8.9 base curves |
| Lens Properties | |
| Specific Gravity: | 1.18 |
| Refractive Index: | 1.43 |
| Water Content: | 37.5% by weight in normal saline. |
| Luminous Transmittance: | 90% |