Published online Dec 9, 2013. doi: 10.5497/wjp.v2.i4.78
Revised: August 8, 2013
Accepted: August 28, 2013
Published online: December 9, 2013
Core tip: The eye is a complex organ where combinations of various anatomical and physiological barriers work together to make it difficult to deliver drugs in the right amounts at the intended sites. To circumvent these barriers and to achieve desired levels ophthalmologists, ocular pharmacologists and pharmaceutical scientists have developed various drug delivery strategies with appropriate mode of administration.