Centra Soft Toric
The Centra Soft Toric lens has been developed at Corneal Lens Corporation NZ LTD for the correction of Astigmatism by a soft contact lens. The unique design is only available by utilizing the latest lathing technology.
The design utilizes dual elliptical back surface optic zones and a spherical periphery. This gives an enhanced alignment fit on an Astigmatic shaped cornea. The front surface has a unique dual weighting area unlike designs that use slab off technology to stabilize the lens. Oscillating toric tool technology is the method used to generate these weighting areas.
The Centra ST has generated reference marks at the 270 position. This eliminates the need for dots for location. The right lens 2 reference marks have a 20 degree total span. The left lens 3 reference marks also have a total span of 20 degrees; 10 degrees between each mark. The three marks on the lens are to assist the patient with identification of the left lens.
The Centra ST has achieved minimum thickness both centrally and throughout the flange. The comfort of the lenses is excellent. Center thickness of.07 is standard on minus lenses.
INDICATED LENS TABLE
PARAMETERS
| PARAMETER | OPTION |
| MATERIAL | ANY |
| BASE CURVE | 7.8MM – 9.6MM |
| DIAMETER | 14.0 – 16.0 |
| POWER | UNLIMITED |
| CENTER THICKNESS | .07 |
FITTING
Simply put, the principles involved in fitting a CONOID lens are:
- The Centra ST can be ordered empirically, provided the details below are given to the laboratory.
- Complete an examination including K readings, spectacle Rx (converting + cylinder into minus cylinder) BVD, axis of the cylinder and HVID.
- When using the Centra ST trial set, select the trial lens closest to the base and axis from the indicated lens table.
- Assess the location of the reference marks noting any rotation.
- Assess the movement and corneal coverage of the lens. Centra ST should not be fitted to small.
For further fitting assistance call our Customer Service team.
WARRANTY
Corneal Lens Corporation NZ Ltd guarantees all CLC NZ made lenses against all defects in materials and workmanship for 30 days from the original invoice.