-1.25 means 125 degrees of myopia and is not an indication of visual acuity, where the minus sign (-) is for myopia and 1.25 is for refractive power. 1.25 is the refractive error, usually followed by the letter D, which is the unit of refractive error, but it should not be used to determine a patient’s naked-eye visual acuity. A negative sign in front of the refractive error indicates myopia, while a plus sign indicates hyperopia; for example, -1.25D means 125 degrees of myopia and +2.75D means 275 degrees of hyperopia. Myopia can lead to vision loss, and generally the higher the degree of myopia, the more pronounced the vision loss. However, there is no one-to-one quantitative relationship between the two, so the patient’s visual acuity cannot be inferred from the patient’s myopia, and the patient can clarify the level of visual acuity through vision examination. It is recommended that patients with myopia should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.