CI26 is now firmly established as the leading hydrophilic material for the production of intraocular lenses. It offers the perfect balance between superior machining characteristics, refractive index and foldability. Its mechanical properties ensure that the lens can be folded and injected easily, while allowing for a smooth and controlled unfolding. CI26 is suitable for a wide range of lens designs using an incision size as low as 1.8mm.

Contamac’s unique manufacturing technology is key to CI26’s consistent performance and predictable results. We also offer a yellow version – CI26Y – that improves blue light absorption.

Nature: Copolymer of hydroxyethyl methacrylate and methyl methacrylate

CI26 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°C1.13
Water content @ 20°C 26%
Refractive index @ 20°C hydrated1.460
Refractive index @ 35°C hydrated1.458
Tensile strength (MPa)2.5
Modulus (MPa)3.0

Environment control

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


CI26 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.


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