Abstract

Anatomay and physiology of the eye makes it a highly protected organ. Designing an effective therapy for ocular disease, especiallyfor the posterior segment has been considered as a formidable task. Limitations of conventional route of administration have challenged scientists to find alternative mode of administration like peri ocular route. Application of nano technology has been very promising in the treatment of a gamut of diseases. In this review, we have briefly discussed several novel ocular drug delivery systems such as microemulsions, nanosuspensions, nanoparticles, liposomes, niosomes, dendrimers, implants and hydrogels. Current momentum in the invention of the new delivery systems hold a promise towards therapies for the treatment of vision threatening disorders.