Hello there, I'm the person in the piece, I hope you don't mind if I respond to your comment above- I wore dailies as per instructions, only single use and then I threw them away. I had worn lenses every day in the run up to the infection. I hadn't gone swimming in lenses in the previous months but I had occasionally showered in them. We don't know what caused my AK, but many patients have reported swimming or showering in lenses before getting the infection and there is a strong correlation. Epidemiological studies have proven the link between swimming in lenses and AK. Studies have also isolated the same exact genetic strain of acanthamoeba from patients' bathroom sinks and shower taps as the one found in their eyes. Showering is a risk factor for AK. If you want to know more please do go ahead and ask anything else.