Results of an ongoing investigation confirm a "strong association" between use of a particular type of contact lens solution - Advanced Medical Optics (AMO) Complete MoisturePlus Multi-Purpose Solution - and increased risk of a rare but serious eye infection called Acanthamoeba keratitis (AK).
Earlier this year, the company voluntarily recalled this product and called on consumers to stop using it after data showed a higher risk of eye infections.
AK is a painful infection of the cornea that can cause corneal scarring and sometimes blindness. Doctors at the University of Illinois at Chicago Cornea Service noticed a sharp increase in the number of AK cases in contact lens wearers beginning in 2003, with a total of 63 cases identified through the end of 2006. This compares to the "two or three cases a year we would normally expect to see," Dr Charlotte Joslin noted in a university statement.