Refractive spherical lens S is the degree of spherical lens that is the degree of hyperopia or myopia, its normal value is related to the patient’s age, early childhood is physiological hyperopia, with age, hyperopia decreases, but also myopia.
Generally, the farsightedness of children within 1 year of age is about 400-500 degrees, at 3 years of age is about 300 degrees of farsightedness, at 6 years of age is 100-200 degrees of farsightedness, and after 12 years of age is mostly orthopia. Myopia can occur if children do not pay attention to their eye habits.
When performing dilated optometry, there will be many checking values on the optometry sheet, among which S is the spherical lens degree, i.e. myopia or hyperopia, if S is positive, it represents myopia, and if it is negative, it represents hyperopia, C represents the cylindrical lens degree, i.e. astigmatism, A represents astigmatism axial position, and PD is the pupillary distance.
Patients with abnormal refractive errors are advised to seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment to improve their vision.