Patent ID: 6884457

Claim:
A method for treating articles, said articles being ophthalmic lenses or medical devices, the method comprising: (1) providing two or more fluids, one at a time, to treat the articles, said articles being ophthalmic lenses or medical devices, in a treatment system, wherein the treatment system comprises one or more trays each of which has one or more baskets, each basket capable of holding one article, and wherein said trays are used to form a vessel or placed within a preformed vessel, said vessel or preformed vessel comprising a first entrance/exit and a second entrance/exit for the fluids; and (2) each time one of the fluids is provided to treat the articles, (a) flushing continuously the articles with the fluid in a first flow direction from the first entrance/exit to the second entrance/exit, (b) reversing the flow direction of the fluid, (c) flushing continuously the articles with the fluid in a second direction from the second entrance/exit to the first entrance/exit for a second period of time, and (d) optionally, repeating steps (a) to (c) for a desired number of times.