The ocular insert represents a significant advancement in the therapy of eye diseases. Ocular inserts are defined as sterile, thin, multilayered, drug-impregnated, solid, or semisolid consistency devices placed into the cul-de-sac or conjunctival sac, whose size and shape are especially designed for ophthalmic application. They are composed of a polymeric support that may or may not contain a drug. The drug can later be incorporated as dispersion or a solution in the polymeric support. They offer several advantages as increased ocular residence and sustained release of medication into eye. The inserts are classified according to their solubility as insoluble, soluble, or bio-erodible inserts. The release of drug from the insert depends upon the diffusion, osmosis and bioerosion of the drug and this article is an attempt to present a brief about this newer drug delivery system.