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Updated: Jan 27, 2026

Use of Rabbit Eyes in Pharmacokinetic Studies of Intraocular Drugs
Published on: July 23, 2016
Depot formulations to sustain periocular drug delivery to the posterior eye segment
Yosra Agban1, Sachin S Thakur1, Odunayo O Mugisho1
1Buchanan Ocular Therapeutics Unit, Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
Abstract:
The periocular space is a promising alternative route for the delivery of drugs to the posterior eye segment, especially when treating conditions in the outer ocular layers. In this review, we discuss the different periocular routes as well as the physiological barriers and elimination mechanisms limiting drug bioavailability at the back of the eye. We then highlight various types of depot formulations, including particulate delivery systems, semisolid formulations, and implants, used to increase the contact time with the ocular tissues. With the additional advantage of sustaining drug release, such depot formulations could enhance periocular drug delivery to the posterior eye segment.
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