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Abstract
Rapid advances in the molecular pathogenesis of retinal and choroidal disorders have
highlighted the urgent need for innovative drug delivery modalities to the loci of
pathology. In vitro and in vivo studies suggest that the transscleral route may offer
a means to achieve the goal of sustained, targeted drug delivery to the posterior
segment. Potentially therapeutic concentrations of macromolecules with retention of
bioactivity can be attained in the choroid and retina via minimally invasive transscleral
delivery.