The older son was diagnosed with congenital strabismus, and the possibility exists that the younger son may also develop congenital strabismus. The etiology of congenital trapezius is unclear, and there is also a genetic hypothesis. There have been reports of congenital trapezius caused by congenital dystrophy of the sternocleidomastoid, forearm, and tibialis anterior muscles, with three generations of family members suffering from the disease, with autosomal dominant inheritance characteristics. Therefore, if the older son is diagnosed with congenital strabismus, the younger son may also develop congenital strabismus. In addition to this, congenital strabismus may be associated with venous obstruction, sequelae of interventricular syndrome, and birth injuries. Therefore, when your child develops congenital strabismus, you should go to a regular hospital for consultation and treatment under the guidance of a doctor, or you can ask your doctor whether your younger son will develop congenital strabismus.