BackToric

Description

Description

The BackToric lens design has a toric back optic zone radius (BOZR).

The BackToric should be used on toric corneas with

  • Corneal Astigmatism higher than -3.50D.

Fitting Recommendations

  • Starting point: on K to 0.5 steps steeper on the flat meridian and 0.3 steps flatter that the steeper meridian.
  • If the script axis and lens axis coincide, but there are still corneal cyl present – make the BC difference bigger.
  • If the script axis and lens axis does not coincide, but there are still corneal cyl present – make the BC difference less.
Additional information

Additional information

Diameter

Variable based on spherical design chosen.

Power

Any power

Colour

Grey, Green, Blue

Material

Medium DK and High DK