Materials
 

Procornea offers a sophisticated selection of contact lens materials. All these materials meet Procornea’s high demands in terms of optical, mechanical and physiological characteristics. Please find below the available materials, arranged in order from low up to high DK. Recently added are the Classic, Comfort and Extra materials, which offer great surface wettability as their most important feature.

Materials
Material DK value¹ Shore-D² Contact angle Refraction index³ Colour UV-filter
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
Alberta 4 16 83 17 1.468 green no
Classic 26 83 12 1.450 blue
grey
green		 yes
Boston EO 57 83 48 1.429 ice blue
blue
green		 yes
Cento 58 73 45 1.420 green yes
Comfort 65 79 6 1.431 ice blue
blue
grey
green		 yes
Boston XO 76 81 50 1.415 ice blue yes
Extra 100 75 3 1.431 ice blue
blue
grey
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 ISO 18369-4. Dk in { 10-11 (cm2 / s ) [ml O2 / (ml hPa)]}
2 ISO 868
3 ISO 9914

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