I wear (soft) contacts and have no trouble with them. I've tried playing with glasses, but can't seem to adjust to them as the glasses bounce around when I'm moving.

If you want to wear glasses, perhaps you get a non-varifocal lens–the shuttle is large enough (and far enough away from you) that you won't need the correction that you would for reading small print. I'm assuming you're seeing 2 shuttles due to the shifting focus of the varifocal lenses; check with your optician if regular lenses for nearsightedness would also have this issue.

I also have varifocals – they don't fall off or move and I don't see two shuttlecocks.  If I were playing more competitively then I would go down the contact lens route.  I used to wear contact when I played rugby and they are, without doubt, brilliant.  The best thing is the peripheral vision – something you lose with glasses.

I don't have a great tear film so they can dry up – but if I am only wearing them for a couple of hours then it is no problem.  One point though, if you have varifocals then you will need to discuss the best compromise with your optician as I believe you cannot get variable contacts – the usual solution being a different prescription for each eye (i.e. one for close and one for distance – apparently the brain adapts quite quickly).

I used to wear contact lenses but now I have had laser surgery on my eyes.

It is the best thing I have ever done and makes me enjoy all sports and other recreational activies way more than I ever did before.

Not sure if laser treatment is applicable to yourself but if it is, I would wholeheartedly recommend it.