When it comes to intraocular lenses (IOLs) for cataract surgery, there are number of different types of materials that eye surgeons can select from. One of these types are hydrophobic acrylic IOLs, which many consider to be one of the most popular types of IOL materials. Hydrophobic acrylic IOLs are generally foldable, have a rather low water content, and a high refractive index.