When looking at a slice with a binocular microscope, the field of vision seen by the left and right eyes always recombines into an "8" shape. How to solve it?

You can put two lens barrels together. It's no use turning the eyepiece Binocular microscopes are usually hinged binoculars, and the lens barrel can be adjusted. My family also has a binocular microscope. At first I didn't know that the lens barrel was adjustable. Just like your case, I happened to find that the lens barrel is adjustable. When I adjust the imaging, it merges into a circular field of view.