However , within 18 months of listing the ophthalmic laser industry experienced a downturn and Ellex was exposed to the fortunes of its major OEM partners .
In 2001 , Ellex also underwent an IPO and listing on the Australian Stock Exchange .
Within 18 months of listing the ophthalmic laser industry experienced a downturn and Ellex was exposed to the fortunes of Ellex 's major OEM partners .
In 2001 , Ellex also underwent an IPO and listing on the Australian Stock Exchange .