If you use Renu Moisture Lock contact solution, don't anymore. Apparently a whole bunch of cases are popping up in which it is linked to giving people eye fungus that can damage your corneas.
More info:
http://www.cdc.gov/mmwr/pdf/wk/mm55d410.pdfhttp://www.cdc.gov/mmwr/preview/mmwrhtml/mm55d410a1.htm