Re: Old dog learns new trick...Welding!
What number shield are you using. I've found that a #10 is actually too dark for MIG welding. I prefer a #8 and I have a corrective lens in my hood ahead of the shield. If you wear glasses by all means wear them while welding and provide the weld area with good lighting.
I had a couple of bad experiences with the self darkening hoods and I still relay on my old fixed one and quick head tilt to lower it when I have the torch (tip) in position. Youngsters will laugh at that but you gotta do what works for you. Good luck.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"