Also known as esotropia, esotropia can be hereditary. Esotropia is a type of horizontal strabismus. Esotropia runs in families, and when there is a strabismus in the immediate family, the probability of congenital esotropia in the offspring increases. Esotropia mainly refers to the inability of both eyes to focus on the same target at the same time, and when one eye is focusing on the target, the other eye is skewed and unable to focus on the target. Esotropia is mainly related to genetics, neurodevelopmental abnormalities, developmental abnormalities of eye anatomy, and lack of oxygen in the brain at birth, etc. Treatment includes lens therapy, medication, and surgical treatment. Young children with symptoms of esotropia should consult a doctor for timely treatment, pay attention to eye hygiene and balanced nutrition.