Just clear your pistol and practice during the commercial break, or use an airsoft if you have one lying around. Blinds closed may be a good idea unless you're in the sticks. lol Pick a light switch or some other small object around the house, multiple objects would be good. Take a good sight picture on the object, then open both eyes without moving. Maintain the sight picture with both eyes open as long as you can confidently see the proper sight picture. Once you lose it just close your weak eye, regain the proper sight picture, and then open your other eye and see it again as long as you can.
Do it a few times in a row until you start to get frustrated or feel fatigued. Start transitioning from one object to another and work on keeping both eyes open longer and longer. I picked it up in one evening just sitting on the couch. Don't try to learn it during live fire. You'll get frustrated and not want to waste the ammo trying to fight through it.
Once you learn it, it's a huge benefit. It's greatly important from a tactical standpoint. If If I have to fight for my life and can only see half of what's in front of me, that's not ideal.
Some food for thought.
