Left eyeball protrudes more than the right eyeball may be caused by trauma, hyperthyroidism, orbital hemangioma and so on. 1. Trauma: If the eye is injured by impact, orbital fracture and other external injuries, it will lead to orbital volume enlargement, hemorrhage, edema and other symptoms, which may lead to the patient’s left eyeball protruding more than the right eyeball phenomenon. 2. Hyperthyroidism protruding eyes: Hyperthyroidism protruding eyes is caused by autoimmune disease proliferation of post-globe tissues, which is divided into simple ophthalmopathy and infiltrative ophthalmopathy. With the aggravation of the disease, the patient may have the phenomenon that the left eyeball is more prominent than the right eyeball, which will affect the patient’s vision. 3. Orbital hemangioma: Orbital hemangioma is a kind of common benign mesodermal orbital tumor, when the tumor presses on the eyeball, it will cause fundopathy, which may lead to the phenomenon of left eyeball protruding more than the right eyeball. When the patient has the phenomenon that the left eyeball is more prominent than the right eyeball, it is recommended to go to the regular eye hospital for detailed examination in time, and after finding out the cause of the disease, give targeted treatment.