What are the reasons why children wear glasses? Part of the reason is that unlike adults, because children's visual system is at a developmental stage, especially during the period from birth to the age of 5-6 years, wearing prescription glasses may play an important role in normal visual development.

The main reasons why children need to wear prescription glasses may include providing better vision, enabling the child to move better in his/her environment, helping children with strabismus to correct eye position, and wearing prescription glasses to help improve the vision of poorer eyes (amblyopic eyes). This can occur when the diopters of both eyes are inconsistent (anisometropia), such as the need to wear glasses when one eye is normal, the other eye has significant myopia, hyperopia, or astigmatism. When one eye has poor vision, glasses can provide protection for the other eye.

Ophthalmologists can determine whether a child needs to wear glasses through a complete eye exam. It is often necessary to dilate the pupils to relax the muscles that regulate focus in order to obtain accurate measurement results. Doctors can give accurate prescriptions through a special tool, the ophthalmoscope. At this point, the doctor will inform the parents of the child whether they need to wear glasses or continue observation.

School-age children and their parents can consider whether they must wear glasses. Some children have less refractive errors and do not need to wear glasses, while others complain that they cannot see clearly while sitting in the classroom. Most children with dyslexia do not need to wear glasses, and these conditions can be judged based on a complete ophthalmic examination.