CI18 is a variation of the well-established CI26. CI18 offers increased tensile strength and high modulus. Its material, mechanical and optical properties are perfectly suited to less conventional lens designs. 

Nature: Copolymer of hydroxyethyl methacrylate and methyl methacrylate

CI18 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

Swell factor @ 20°C1.10
Water content @ 20°C 18%
Refractive index @ 20°C hydrated1.471

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

Environment control

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


CI18 can be polished using tumble polishing methods.


Hydrate the finished IOL in borate buffered pH 7.2 isotonic saline or a similar buffered saline solution.


Your Marketing Permissions

Contamac will use the information you provide to share consented marketing efforts. Please let us know which marketing efforts you wish to receive from us:

You can change your mind at any time by clicking the unsubscribe link in the footer of any email you receive from us, or by contacting us at We will treat your information with the highest level of respect. For more information about our privacy policy please visit our website. By clicking below, you agree that we may process your information in accordance with these terms.