Phew. That was LUCK. I noticed this mornig that my vision was the PITS; almost as if I didn't have the contact lens in place; double checked the case and yes, I had applied it this morning. I was feeling a small amount of irritation that normally means it's moved.
Tried peering into the eye with the the selfie lens of my phone; no go. Tried feeling through the eye lid for the errant lens; no go.
Got a spare lens and started rehydrating it while thinking maybe I should call my optometrist and head down town to get them to find the darned thing.
Suddenly; I CAN SEE AGAIN! Obviously, my blinking, tearing up etc was sufficient to help the lens move to the correct location
(I must add that my wife had become skilled over the years at peering into my eye and finding it, and also at gently sliding the lens on the eye. Not sure if I trust the friends I'm staying with to try that).
Have I ever mentioned how much I hate my eye!