High right eye and low left eye may be caused by dysplasia, vertical strabismus, and monocular ptosis. 1. Dysplasia: Due to congenital imbalance of facial development, the right eye is high and the left eye is low in this case, but there is no abnormality found when the eyes are examined. 2. Vertical strabismus: Due to the direction of vision of both eyes is not parallel, the vision of the right eye is high while the vision of the left eye is low, so the right eye is high and the left eye is low. 3. Monocular ptosis: Due to the ptosis of the left eye, the eyelid can not be raised normally, so from the appearance of the two eyes are not at the same level, the right eye is high and the left eye is low. If the right eye is high and the left eye is low at a later stage, you should go to the hospital in time for a clear examination and treatment under the guidance of the doctor.