My so just reminded me of when he had a major prescription change, that made the left eye stronger. He just popped the right lens out of a set of sunglasses. [ I had forgot this! ]

It took a while to for the prescription change to settle in.

Then he didn't need the sunglasses any more.

He also said some of the "old timers" use to put a piece of scotch tape on the left lens, when he shot leagues.

I discovered the same years ago when I had a release finger pull loose with a 96 pound bow and was forced to go full time left handed for a number of years. Certainly, one can shoot cross dominant, but when it is new to the shooter there is a learning curve that needs to be dealt with.