Hi V1R,
I have been wearing contact lenses for quite some time now (25 year) and have tried them all at some point (Soft / Gas Perm / Hard) - the ones I have now are indeed highly oxygenated and are the most comfortable that I have ever worn.
The only thing I find an issue is not actually when flying, but after we have landed. If its a hot day, when taxying, the instructor/ examiner used to just put his door ajar to get some fresh air -
This used to cause me loads of problems with dust being whooshed about in the cockpit - I ask them not to unlatch the door until we stop no matter how uncomfortable.
Doesn't happen many times of course in the UK - but has happened 2 or 3 times while training.
GV