Test is shown for a right handed shooter, for left hand, reverse.
Around 40% of all shooters have an eye dominance problem, so checking and correcting it is crucial.
Focus on a precise distant object, for this example the lone tree in the centre is used.
Clench your left hand into a fist and protrude your thumb to make a thumbs up sign, with your left arm straight by your side. Raise your straight arm quickly to point with your thumb at the object you selected. You should see two thumbs, one from your left eye and one from your right.
Keep your arm straight and close your left eye, if the left of the two thumbs are blocking out the object, (see Fig 1) you have a right master eye.
If the right of the two thumbs are blocking out the object, (see Fig 2) you have a left master eye. If you thumbs are either side of the object, (see Fig 3) you have
central vision
Fig 1
Right Master Eye
Fig 2
Left Master Eye
Fig 3
Central Vision