Intraocular lens is made ofa) Hydrogelb) Siliconec) PMMAd) Teflon

Intraocular lenses are typically made of materials such as silicone, acrylic (PMMA), and hydrogel. Teflon is not commonly used for intraocular lenses. Therefore, the correct options are:

a) Hydrogel b) Silicone c) PMMA

Each of these materials has different properties that make them suitable for use in intraocular lenses. For example, silicone is flexible and can be folded, which allows for smaller incisions during surgery. PMMA is rigid and requires larger incisions, but it is durable and has a long history of use. Hydrogel is also flexible and has good biocompatibility, making it comfortable for the patient.