Normal visual acuity is 5.0 or above, and a visual acuity of 2.5 is abnormal. Visual acuity of 2.5 is usually a manifestation of myopia, and its severity needs to be clarified through perfect optometry and other relevant examinations. Visual acuity of 2.5 needs to go to the ophthalmology department in time for further visual acuity examination to determine the specific cause, and then choose the appropriate treatment. If there is a loss of vision, can not see things clearly, you need to wear glasses to correct the situation. It is recommended that patients should pay attention to eye protection, do not overuse the eyes for a long time, do not use the eyes too close, after using the eyes for a period of time, should be appropriate to look into the distance, and appropriate massage of the eyes, to maintain the correct posture of the eyes. If you feel any other eye discomfort promptly consult a doctor.