Fred, runway and run-in lights near the threshold just aren't bright
enough to interfere with night vision. You'd also think changing focal
distance from 30 inches to the instruments to fractional miles might be
a problem, but I hadn't noticed it being an issue. What you will find
interesting is flying an ILS to minimums in a cross wind. As you get
close to your decision height and start including the windscreen in
your instrument scan -- I'm sure you'll be looking straight ahead --
you'll be surprised to see the runway lights way over to the side. It's
not a big deal, but after a while you'll find yourself noticing you're
10 or 15 degrees off the runway heading as you get lower, and you'll
start looking off to the correct side to see the threshold lights.