What future?

I was getting ready to go to the store (just returned late last night from Wales), and realized I need to order more contacts. I used to ruefully laugh when my mother-in-law said she no longer buys green bananas (she's 85)... but I realized that I don't know if I'll need the usual order of 6 months of lenses, and I'm only 59. The website I accessed last night (the web can be great for info... or terrible when it provides info you don't necessarily want to read) said that if the cancer had metastasized (probable with large tumors), I'd have about 7 months... how do I deal with that??