Nearsightedness and farsightedness in the eyes usually refers to nearsightedness in one eye and farsightedness in the other, and requires prompt medical attention for correction. In addition, if one eye is both nearsighted and farsighted, mixed astigmatism may also be a problem. Myopia in one eye and hyperopia in the other indicates that the refractive state of the two eyes is not synchronized, which mostly occurs in children. In this case, it is necessary to consult a doctor in a timely manner, and after completing optometry and other examinations, it will be corrected, so as to avoid affecting the visual function and causing amblyopia, strabismus, and other problems. Patients with myopia and hyperopia in one eye may have mixed astigmatism. In one direction, the patient has hyperopic astigmatism, but in a direction perpendicular to that direction, the patient has myopic astigmatism, called mixed astigmatism. To treat this, corrective treatment is usually done with frames or contact lenses and refractive surgery. Eyes and myopia and hyperopia, it is recommended to seek timely medical examination and treatment, so as not to miss the condition.