A little while ago I cancelled my monthly contact lens payments in order to save a few quid. When my supply of lenses wore out I went back to wearing my specs full time. In most ways it hasn’t been a problem but I’ve found that riding the bike isn’t nice because I don’t have proper peripheral vision, which makes looking behind me a complete waste of time.
I’m close to ordering some new lenses but, in the meantime, I think I’m going to have to stop riding the bike for reasons of safety. Not being able to see what’s behind me before I turn or change lanes is a major issue.