Statistically, by a huge factor, most air to airs happen in the circuit. Of those 60% are run down from behind
Where you just don't stand a chance of saving yourself.
I've had a couple in my 150 hours. One was indeed in the circuit, in bad viz and it persuaded me not to be such a silly billy and continue flying in such weather!
The other was very lucky indeed. Finding the cloudbase seemed to be lowering a bit, I descended 100ft or so to be on the safe side. 30 seconds later someone emerged from the cloud roughly at the height I had been maintaining previously.
On neither occasion would my eyes have helped me, I'm afraid to say.