Acrylic and silicone spheres are permanent implants used to replace the lost volume and to give motility to the ocular prosthesis following an enucleation, evisceration or an insertion of a secondary implant (to replace an implant that was or has to be removed) in ophthalmology.These ocular implants are sold non sterile. They must be sterilized before usage. The users must gas sterilize (EtO) the acrylic spheres (not autoclave). The silicone spheres can be autoclaved (steam). The ophthalmic surgeon chooses the size and the type of implant for the surgery.
An implantable ocular device designed to permanently fill the orbital cavity following enucleation, evisceration, or after the removal of another ocular implant (used as a secondary implant), to replace the volume and possibly, given the surgical method, to impart motion to the eventual ocular prosthesis (the artificial eyeball). It is typically aspherical and may have porous surfaces to facilitate colonization by fibrovascular tissue to offer the advantages of reduced risk of infection or implant extrusion. It is available in various sizes and is typically made of polymethylmethacrylate (PMMA), poly 2-hydroxyethylmethacrylate (PHEMA), or silicone.
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