It might be you mean the diopter.
https://www.birdwatching.com/optics/diopter_set.html
Though from what you say, possibly not. When you open them up for use, you have to set each eyepiece the right distance apart for your face, so that each eyepiece lines up correctly with your pupil. Try looking deliberately through one and then bringing the second one into line. Also, the eyepieces have to be the right distance from your eyes. Try holding the binoculars in one hand with the other wrapped over that and put the fleshy part of your thumb and index finger right up against your face ... it allows for stability as well as being able to hold them the right distance from your eyes ... trial and error to get it right.
https://www.knivesandtools.com/en/ct/binoculars-adjustment.htm
https://www.birdwatching.com/optics/diopter_set.html
Though from what you say, possibly not. When you open them up for use, you have to set each eyepiece the right distance apart for your face, so that each eyepiece lines up correctly with your pupil. Try looking deliberately through one and then bringing the second one into line. Also, the eyepieces have to be the right distance from your eyes. Try holding the binoculars in one hand with the other wrapped over that and put the fleshy part of your thumb and index finger right up against your face ... it allows for stability as well as being able to hold them the right distance from your eyes ... trial and error to get it right.
https://www.knivesandtools.com/en/ct/binoculars-adjustment.htm
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