Reserve visual acuity is not reversible. Usually reserve visual acuity refers to a process in which a person’s eye develops from hyperopia to orthopia and then to myopia at an early age. Usually this farsightedness is called reserve vision, usually around 350 degrees of farsightedness at the age of three, and at the age of 5-6 may be 150-250 degrees, there is a certain amount of farsightedness, for the development of myopia has a certain role. Of course, with the development of society now, due to the increased use of electronic products by children, the reduction of outdoor activities, etc., so that the eyes are in a state of fatigue, may be faster consumption of farsightedness, some children at the age of 5-6 years old farsightedness reserve degree is 0, indicating that the development of myopia will come soon, so parents are now actively eye screening, to determine how much reserve vision, to determine the development of myopia trend.