الفهرس 
Ophthalmic prosthetics
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Abstract
The use Of HA as an orbital improvant to improve motirily was devised by Mhur
Perry, and its use in the orbit was approved by the FDA in August 1989Y~)
The ideal oCl.llar implant should be completely buried: simple in construction
without projecting or angulaled surfaces thai might erode though lIle
conjunctiva, rightweight, and smaller than the globe 10 aljQ\.\1for prosthesis Of
adequate anterior chamber depth. ln aodltion, il should be ~nlered within the
muscle cone, and anchored to orbital tissues to minimize extrusion II should
have extra-ocular muscles attached, and should be directly integrated in some
way with the prosthesis for 1:1 transfer of motility. It should induce minimal
tissue inflammalion and should nat resorb over time.
HA implanted as described above fulfills all of these criteria Clin~cal trials over
the pas I several years, proved that the technique 10be safe and effective(74J,
With no significant complications~78:’
Coreilina HA as an ocular implanl appears to offer.a significant improvement
aver all previously used material’S. However, the cost ot the implant, represents
a major obstacle in the reconstructive process. That is why. we Ined ill this
study, 10 test another implant material {5ynthetic HA}, that is half-priced the
price of Coralline HA.
There were a number of indications 10 proceed with the reconstructive
technique of ocular implant that included atrophic globes, blind·painful eyas,
severely traumatized globes, endapnlhalmitis, and intra-ocular rnaliqnancy.