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Contamac developed Definitive, the first latheable silicone hydrogel material. It became the benchmark for a new generation of lathe-cut silicone hydrogel materials, winning the Queen’s Award for Innovation in 2016.

In addition to providing increased oxygen permeability, its unique surface qualities and outstanding level of on-eye comfort ensure that Definitive is ideal for producing a wide range of lens designs while supporting corneal health.

Features and benefits

  • Higher oxygen permeability (60 Dk)
  • Low modulus for excellent comfort
  • Wettable surface – no surface treatment required
  • FDA-cleared


Definitive Technical Data

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Accessories & Consumables

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More from the range

Silicone Hydrogel

Our Silicone Hydrogel materials have combined the benefits of soft lens materials with increased oxygen permeability to ensure outstanding levels of on-eye comfort and improve corneal health.

Unisil offers outstanding surface wettability, and the increased oxygen permeability of a silicone hydrogel, combined with a higher modulus to enable more complex lens designs, improving visual acuity and supporting corneal health.

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