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The prisms have shifted inside of the binoculars. This is not an easy job as you have to make corrections to the angle of the prisms for leaning field and collimation. Two suggestions:
1. If they are under warranty take them to a repair agent.
2. If you want to do it yourself, there are instructions on the web about how to go about effecting a collimation. Too long to go into detail here.
The distance between the centers of the eyepieces of your binocular must be the same as the distance between your pupils. This distance is adjusted as follows:
1. Focus on a distant object.
2. Pivot the two halves of your binocular farther or closer apart until you can see a single unobstructed, circular field of view.
Make sure to focus on a distant object when you do this because when you focus on a close object you always see two slightly overlapping circular fields.
Your binocular may have a scale on the top, between the eyepieces, to help you remember this setting.
you binoculars are probobly out of alignment.
Having them realigned costs about $100. If the binoculars aren't
expensive, you might want to try this yourself. Basically, one of the front lenses is off-center, and you can rotate it in its mount until the alignment is right.
(I.e., it's off center in the right direction.) You will need an
optical spanner (which Americans redundantly call a "spanner wrench") or an improvised substitute in order to do this.