What reason is 2 years old treasure strabismus?

summary

Strabismus refers to the phenomenon that two eyes can't look at the same target at the same time, only one eye looks at the target, and the other eye's axis is biased to one side of the target. There are many kinds of strabismus, the most common is the eye inward deviation, medical called esotropia, commonly known as "eye", "cockeye". What reason is 2 years old treasure strabismus? Let's talk about it.

What reason is 2 years old treasure strabismus?

1. Children with incomplete development, especially infants with incomplete binocular vision, can not coordinate the extraocular muscles well. Any unstable factors can promote the occurrence of strabismus. People's single vision function is gradually developed after birth. This kind of function, like visual function, is gradually developed and matured by repeatedly receiving the stimulation of clear images from the outside world. After 2 months of birth, the baby only has the general image fusion, the establishment of accurate image fusion function should last until after 5 years old, and the establishment of stereopsis is the latest, and it can approach the adult at the age of 6-7 years old. During this period, strabismus will occur if there are high degree of ametropia and anisometropia, retinal macular dysplasia, macular diseases and optic conduction pathway diseases, and binocular monoclyopia cannot be formed. Or strabismus is caused by the instability of binocular monocular function in children, which is weakened by external stimulation (such as fever, shock, trauma, etc.). After strabismus, it hinders the development of binocular monocopia, aggravates the development of strabismus, and forms a vicious circle. Therefore, the high incidence of strabismus in children is during the period of imperfect binocular monocular function before the age of 5.

2. Congenital anomaly this kind of strabismus is mainly caused by the anatomical defects such as congenital abnormal position of extraocular muscle, abnormal development of extraocular muscle itself, incomplete differentiation of mesoderm, poor separation of ocular muscle, abnormal muscle sheath and fibrosis, or nerve palsy dominating the muscle. In some cases, the use of forceps in the process of production may cause head and face injury of the baby or excessive force of the mother during production, resulting in increased fetal intracranial pressure, resulting in cerebral punctate hemorrhage, which happens to cause extraocular muscle paralysis at the nerve nucleus that dominates the eye movement. In addition, there are also genetic factors. Strabismus is not inherited in all members of the family, and this defect is often indirectly inherited to the next generation of children. Generally, strabismus within 6 months of birth is called congenital strabismus. It does not have the basic conditions for the establishment of binocular vision and is the most harmful to the development of visual function.

3. Children are prone to strabismus because of the characteristics of eyeball development. Because children's eyeball is small and their axis is short, most of them are hyperopia. In addition, because children's cornea and lens have great bending power, their ciliary muscles have strong contractile power, that is, their adjustment power is strong. Such children want to see objects need more adjustment force, at the same time, both eyes also force to turn inward, resulting in excessive radiation, easy to cause esotropia, this kind of esotropia is called accommodative esotropia.

matters needing attention

Eye outward deviation, known as exotropia, commonly known as "oblique white eye.". Of course, strabismus not only refers to the relative position of the two eyes with obvious deformity, but also includes the situation that the slope is very small, the surface is not easy to detect, and the binocular visual function is abnormal, and also includes the situation that there is no oblique position but the two eyes are abnormal. Therefore, the concept of strabismus should be understood as the relative position of two eyes and binocular visual function.