Cantor Prosthetic

A high quality soft daily wear contact lens for prosthetic use.


There are multiple ordering options for this highly reproducible prosthetic lens, making it an ideal lens for helping patients with many different eye conditions. Please view the downloadable informational product brochure for more information, including the Cantor Prosthetic Colour Chart.




  • Spherical or Toric designs
  • 10 colours available
  • Clear backed lens allow natural iris to show through
  • Black backed lens occludes natural iris and light
  • Lathe Cut
  • Patented chemistry
  • Near photographic quality iris detail
  • Available as a clear lens with occlusive pupil (Cantor Occlusive)
  • Available with pinhole pupil


  • Thinner lens design
  • Guranteed reproducibility
  • Can disguise; corneal scars, congenital coloboma, aniridia, traumatic iridoplegia
  • Open or Closed pupil
  • Comfortable fit
  • Pinhole pupil available on 4.50mm pupil diameter
 Recomended care system is Quattro multipurpose solution by Abatron, Hydrogen peroxide systems MUST NOT be used.  Please also avoid the use of barrel cases.

Material Filcon I 1
Water Content 38%
Base Curve (mm) 8.00 to 9.40 (0.10 steps)
Permeability (Dk) 7.9 x 10 -11
Diameter (mm) 13.00, 13.50, 14.00, 14.50, 15.00
Power Range
-30.00D to +30.00D (0.25D steps)
Higher powers may be available
Cyl Powers -6.00DC to -0.75DC (0.25D Steps)
Axis Powers 5o to 180o (5o steps)
Centre Thickness (mm) 14.50mm -3.00 = 0.12
Open Pupil Diameter (mm) 2.50, 3.50, 4.50
Closed Pupil Diameter (mm) 2.50, 3.00, 3.50, 4.00
4.50, 5.00, 5.50, 6.00 6.50
Pinhole Pupil (mm) Aperture
1.50, 2.00, 2.50, 3.00 3.50
Visible Iris Diameter (mm) 11.50, 12.00, 13.00
Cantor Occlusive Pupil Diameters (mm) 3.50, 4.00, 4.50, 5.00
5.50, 6.00, 6.50 7.00
7.50, 8.00, 8.50 9.00
10.00, 11.00, 12.00


  • Full refraction and eye examination
  • Keratometry
  • Select diameter required 2-3mm larger than HVID
  • Select Base Curve according to corneal curvature, but with a flattening differential relative to the diameter of the lens shown below:
Lens Diameter Order Base Curve Flatter Than Flattest K By:
12.50mm 0.30mm - 0.40mm
13.00mm 0.40mm - 0.60mm
13.50mm 0.60mm - 0.80mm
14.00mm 0.80mm - 1.00mm
14.50mm & 15.00mm 1.00mm - 1.20mm

Good Fit

  • Comfortable
  • Good centration with full coverage of limbus, even in upward gaze
  • Adequate smooth movement in all directions of gaze
  • Good recovery on push-up test
  • Carry out over-refraction and order exchange lens if required

Flat Fit

  • May give poor centration
  • May give unstable vision
  • Can cause discomfort
  • Try steeper base curve (If available)
  • Over-refraction

Steep Fit

  • Displays inadequate or no movement
  • Resists push up test with lower lid
  • Can cause blanching
  • Try flatter base curve (If available)
  • Over-refraction

Cantor Prosthetic



Optician looking to order? Call us on +44 (0)1280 702002

Register with Cantor and Nissel for our online ordering facility and be able to order the following lenses via our website: Cantor Prosthetic, Hydrocyl, Hydrofit, Hydrolens and Nissel Custom Hand Painted. The online forms with their drop down menus allow you to order lenses without the need to refer to any size or colour charts.