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Silicone intraocular lens

Synonyms

Silicone IOL

Definition

An intraocular lens, that is made of silicone (polysiloxane).

Epidemiology

Of all implanted IOL, silicone material accounts for about 5%.

History

After first experimental studies by A. D. Ruedemann in the 1970s, silicone has been used as an IOL material since the early 1980s with Food and Drugs Administration (FDA) approval obtained in 1990. The first silicone IOL had an refractive index of 1.41.

Clinical Features

Advantages of IOLs made of silicone are they are heat resistant, autoclavable, moldable, compressible, highly transparent to visual light, very flexible and provide good tensile and tear strength. Their disadvantages are, that they are slippery, which makes them more difficult to manipulate, they can be pitted, have a lower refractive index than acrylic lenses which refers to a higher thickness and show high adherence to silicone oil after vitreoretinal surgery. Silicone’s angle of water contact is 99°, which