Exhibit 8.1

Exhibit 8.1 to Registration Statement on Form 20-F

of pSivida Limited

List of Subsidiaries

AION Diagnostics Limited, Australia

AION Diagnostics, Inc.

pSiMedica Limited, United Kingdom

pSiOncology Pte. Limited, Singapore

pSivida Inc., United States

pSiNutria Limited, Australia