The Contaflex range of soft contact lens materials employs a novel polymerisation technique together with the highest purity monomers. The result is a range of soft lens materials with water contents from 58% to 75%, that exhibit zero stress and excellent machinability.

Contaflex’s mid- to high-water content means greater permeability, leading to improved user comfort and excellent clarity. The water content in Contaflex 75% is ideally suited to bandage and other therapeutic lens applications. 

Contaflex technical information

Please Note: Regulatory requirements and standards vary from country to country, and are constantly evolving. As a global company, we want to be sure we provide you with detailed technical information, specific to your market, where appropriate, rather than using the condensed and simplified technical information on the website. If you need to use technical data for quality paperwork, or for a regulatory submission, please contact your account manager to obtain this precise and detailed information to support your regulatory requirements, we will be happy to help. 

Material characteristics

PropertyContaflex 58%Contaflex 67%Contaflex 75%
Oxygen permeability (ISO) @ 35°C (barrers)213043
Swell factor @ 20°C1.371.491.61
Water content by refractometer @ 20°C58%67%74.5%
Refractive index @ 20°C dry1.5101.5201.525
Refractive index @ 20°C hydrated1.4051.3901.375
Light transmission (%) @ 380-780nm>94%>95%>95%

Please note: These are typical values. Always check the certificate of conformity supplied with the goods for the actual values of the batch. Other materials available on request.

Environment control

For best manufacturing conditions Contamac recommends 19-23°C with a relative humidity of 45%-60%.


The recommended polishing compound is Contapol 2 with a spindle speed of 3,500rpm and weight of 240gms. With the above machining recommendations polishing should require a maximum of 30 seconds.


Hydration of these materials is best performed in buffered saline with a pH of 6.8-7.3.

Manufacturing Consumables

  • High melt blocking wax
  • High melt blocking beeswax 
  • Kemdent blocking Wax
  • Water soluble wax
  • Contapol 1 polishing compound
  • Contapol 2 polishing compound
  • Cotton polishing cloth 
  • Delrin polishing cup
  • Delrin polishing sponge
  • Roller sponges


  • Tweezers
  • Glass vials
  • Stoppers
  • Aluminium top seals
  • Flip tear up seals
  • Shrink-wrap sleeves
  • Double soft lens mailers
  • Net vial sleeves
  • DMV soft lens remover
  • Lens catch mat


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