Bloke on the range goes into this in his video[1] on olympic pistol target shooting. For him it helps to block his non-dominant eye as he has a weak dominant e

Bloke on the range goes into this in his video[1] on olympic pistol target shooting. For him it helps to block his non-dominant eye as he has a weak dominant eye. Also, the pupil responses are linked, so you'd want both eyes to be exposed to similar brightness. So you don't want to close it or wear a patch. [1]: https://www.youtube.com/watch?v=zfaK4Hz0Na8 https://www.youtube.com/watch?v=zfaK4Hz0Na8