12-year-old boy with normal eye axis

The normal range of axial length in

boys aged 12 years is 18-22 mm.

The normal range of axial length in boys varies with age and individual differences. In general, the normal range of axial length in boys aged 12 years is 18-22 mm. Axial length is the distance from the anterior surface of the cornea to the posterior surface of the retina, which plays an important role in the structure and refraction of the eye. Too long or too short axial length may lead to refractive errors such as myopia or hyperopia.

However, it should be noted that the normal range of axial length can also be affected by other factors such as race, genetic background, etc. If there are specific concerns or questions about axial length in children, it is recommended to consult an ophthalmologist for a detailed eye examination and evaluation.