BOSTON & PERTH, Australia--(BUSINESS WIRE)--pSivida Limited (NASDAQ:PSDV)(ASX:PSD)(Xetra:PSI), today announced that Dr. Roger Aston, who joined the Board as a Non-executive Director in December 2006 has resigned to focus on other activities including his role as the CEO of his new Australian based company, HalcyGen Pharmaceuticals Limited.
