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Arch Ophthalmol. 2003;121:400-403.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Porous polyethylene (Medpor; Porex Surgical Inc, Newnan, Ga) orbital implants are increasingly popular and used commonly as sheets, blocks, or spheres for volume replacement in the anophthalmic socket and for orbital wall repair in orbital wall fractures. Synthetic orbital implants are generally less expensive than natural coral implants and are also biocompatible and nontoxic, with interconnecting pores and channels.^1-3

Fibrovascular tissue growth from adjacent orbital tissue into spherical porous polyethylene orbital implants is well established and has been demonstrated^{2, 4} using several techniques (histopathologic findings,⁵ technetium isotope scanning,^6-7 computed tomography,⁸ and magnetic resonance imaging^{1, 7-8}). Vascularization usually occurs from the periphery of the implant toward the center of the sphere and aids integration of the implant into host tissues. This is believed to reduce infection, extrusion, and exposure of the implant.

Porous polyethylene sheets or blocks are increasingly being used as orbital floor implants (especially in augmenting orbital volume postenucleation and . . . [Full Text of this Article]

Report of Cases

Case 1

Case 2

Case 3

Histopathologic Findings

Comment
Corresponding author: Jane M. Olver, FRSC, FRCOphth, Oculoplastic and Orbital Service, The Western Eye Hospital, Marylebone Road, London NW1 5YE, England (e-mail: janeolver@aol.com).