The inability to fuse the images of both eyes is called binocular diplopia and is usually caused by paralysis of the extraocular muscles or restrictive strabismus, among other things.
Paralysis of the extraocular muscles: When the extraocular muscles are paralyzed, the dominant movement is weakened, so the eyes are skewed and one eye may see a solid image while the other eye sees an image that is not real, resulting in binocular imaging that does not merge.
Restrictive strabismus: It is related to diseases such as extraocular muscle fibrosis, which will lead to serious non-parallelism in the direction of vision of both eyes, resulting in too much difference in the sights seen, beyond the range of the visual center that can fuse the images, which will lead to heavy shadows in the sights, and cannot be fused.
At this time, the patient should go to the ophthalmology department of the hospital for timely examination, through the extraocular muscle function examination, orbital CT examination, etc., to clarify the specific causes, and then take targeted treatment to eliminate the symptoms.