Children who look at things with a crooked head and squinted eyes to check that it is not strabismus may be caused by bad habits, or it may be caused by strabismus, nearsightedness, as well as other causes such as farsightedness. 1. Bad life habits: If someone around the child often looks at things with squinted eyes, the child may imitate the behavior and thus develop the habit of looking at things with squinted eyes. This is not a disease and parents need to educate their children to develop good eye habits. 2. Strabismus: The cause of strabismus is still unclear, and it is considered to be caused by contracture of neck muscles and abnormal development of cervical vertebrae. The patient will have head tilted to the affected side, neck pain, limited neck rotation and other manifestations. If a child has a tilted neck, he or she will look at things with a tilted head and squinted eyes. 3. Myopia: The cause of myopia is still unclear, and may be related to heredity, bad eye habits and environmental factors. Patients will show visual fatigue, loss of distance vision, etc., and may also have the symptom of tilting head and eyes. 4. Others: Children with hyperopia and astigmatism may also have tilted head and eyes. It is recommended that children with tilted head and squinted eyes to check that it is not strabismus, parents need to take their children to the doctor in time, if it is caused by bad habits, need to be corrected. If it is caused by disease, we need to treat the cause of the disease.