The USS Enterprise set off on a 5 year mission to explore, fight Klingons and all that kind of stuff. Whilst not up to the same level of intergalactic excitement I've embarked on my own mission, a 3 year contact lens desensitization mission. As a sufferer of kerataconus I should wear rigid gas-permeable lenses but half an hour of those and I want to tear my eyes out of my head. So after a trip to my local hospital (free, yay NHS!) I've got my 'training wheels' equivalent of contact lenses on order, large soft lenses. After a year of wearing those I've move up to hybrid lenses (rigid inside, soft outside), then a year after than my final destination, rigid gas-permeable lenses.