Hi,
Not sure if this helps in any way but: Every now and then I think my eyesight is slipping. So far, I have nailed this down to simply not getting enough sleep. Once I forced my self to go to bed at 22:00 rather than midnight (or beyond) for a few days everything was back to normal.
I understand where FFF is comming from, but I worry that if you speak to your sponsor too soon it may confuse the situation. Personally, I would not say anything until I have had my eyes tested and know for sure one way or the other. But that is me and my judgement, it may well be inappropriate under your specific circumstances.
Just a thought,
HWD.