Hyperopic reserve deficiency refers to a decrease in the amount of hyperopia normally present in a child, suggesting that the child may develop myopia in the future and requires early intervention. As children’s eyeballs are not well developed, they are still relatively flat and their eye axes are relatively short, so they are all farsighted. As their age increases, their eyeballs develop gradually and their visual acuity returns to normal, which is a normal physiological process. Therefore, if a child’s hyperopia is less than the normal range for that age, it is called hyperopic reserve deficiency, and it will easily develop into myopia in the future. At different ages, children have different degrees of hyperopia. According to the “Kindergarten Myopia Prevention and Control Manual” of the Commission on Health and Welfare of the People’s Republic of China (CHP), children aged 0-3 years old should have 300 degrees of hyperopia, which will gradually become smaller as their age increases. Children with insufficient reserve of hyperopia are recommended to insist on daily outdoor activities, control near eye use, use eyes in a scientific way, and avoid prolonged use of electronic products. Children with myopia are advised to consult a doctor in a timely manner to assess their condition and follow the doctor’s instructions for treatment.