you should have shown your violin teacher a picture of Jascha Heifetz playing. Probably the best playing technique in violin history, never took his eyes off the board. Take that teacher!I don’t. We all locate once I a while but I really don’t have the habit.
And it’s not because I am any good at all. It’s because for years my violin teacher whacked us every time she caught us peeking so after a while you just cave in. So when I am playing I try to make eye contact ot at least look towards someone.
So my advice is to have a mean teacher.