A2 ProVision

17mm Corridor Progressive Lens Design

A2 ProVision is the ultimate all-purpose progressive lens design for any base or addition. Especially designed for quick adjustment, A2 ProVision enables smooth transition from far to near vision, as well as clear vision at medium range.

A2 ProVision offers an all-aspheric, soft lens design with an exceptionally wide distortion-free area for every vision zone and reduced vertical prismatic levels in the entire lens area. The design is best suitable for large frames.

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Technical Data

  Fitting Cross (above of MRP)                    2.0mm
  Distance Circle (above of MRP)    8.0mm
  Near Area Circle 17.0mm + 8° down to center and side
  Corridor Width 7.0mm (1.0 diopter scale
  Addition Area Width                                          18.00mm (1.0 diopter scale)
  Maximum Nasal Astigmatism No more than addition
* Measured on base 4.00 addition 2.00

Prescription Range

  Mold Nominal Base Curve Mold Radius (RCX)
  2.50 193.90
  4.50 125.95
  6.50 84.60
  8.00 68.75

Mold Availability

  Bases                                                          2.50, 4.50, 6.50, 8.00
  Addition Powers 1.00 to 3.50 in 0.25D steps
  Refractive Indexes                            1.498, 1.56, 1.60, 1.67, 1.586 (PC)