Materials
 

The standard material for all our lens types (except Klaver 3000® and DreamLens®) is Cento. Cento is an excellent material which transmits a high amount of oxygen and has the same price as materials with a low DK.
With lenses made of Cento material your clients achieve wearing comfort far more quickly.

 
oxygen-permeable polymer structure increased oxygen permeability
oxygen-permeable compounds excellent stability of the material
low amount of silicones improved wetting and fewer deposits
fluorine-containing material fewer deposits and easy to clean
 

Application:
· extremely well suited for all lens types (except for Klaver 3000 and DreamLens®)
· daily wear

If you prefer a low DK value, we advise Boston ES.

You can of course always make a choice from the materials below.
 
Materials
Material DK value¹(according to the FATT-method) Shore-D² Contact angle³ Refraction index4 Colour UV-filter
Cento 58 73 45 1.420 green yes
Alberta II 16 86 22 1.470 green no
Sil-O-Flex II 13 89 12 1.470 blue
grey
clear		 no
Boston ES 14 85 52 1.443 ice-blue
blue
grey
brown
green		 yes
Boston XO 76 81 50 1.415 ice-blue yes
Boston EO 57 83 48 1.429 ice-blue
blue
green		 yes

When fitting a contact lens with UV-filter the fluorescein pattern may be less visible. This problem can be solved by using a yellow filter.

Attention: UV-filters in contact lens materials give some protection under normal circumstances. Under extreme circumstances it is still necessary to wear UV-blocking sunglasses.

1 FATT-method ISO 9913-1: (*10-11(cm2/sec)(ml O2/(ml*Hpa)))
2 ISO 868
3 There is no internationally accepted uniform measuring method for measuring the contact angle
4 ISO 9914

For additional information you can contact Procornea by e-mail: info@procornea.nl