Crossbows Optical Ltd
Home Profile Technology Products Links Contact

Progressives

Aspherics

Freeform
Crossbows Custom 18 Freeform Progressive

Contour II

Features of design

  • Low distortion soft design
  • 18mm corridor length to full addition power
  • Minimum fitting height of 19mm
  • Wide usable corridor
  • Individual designs for left and right eyes
  • Moulds in 1.498, 1.56, 1.586, 1.60, 1.67 and 1.74 indices
The Custom 18 design with its low rates of change and levels of astigmatism provides good dynamic vision combined with generous intermediate and reading areas. Maximum astigmatism is located on the nasal side where most of it will be edged away.



Custom 18 Design Dimensions



Note: The decentration on these lenses is variable.

Range available:
Index Additions
0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50
1.498 • • • • • • • • • • • •
1.560 • • • • • • • • • • • •
1.586   • • • • • • • • •    
1.600 • • • • • • • • • • • •
1.670 • • • • • • • • • • • •
1.740   • • • • • • • • •    


Top | Home |  Contact      © 2009 Crossbows Optical Ltd. All rights reserved.