Eyes are the windows to the soul, and a good-looking pair of eyes can add to the face value. In recent years, with the ever-changing concept of aesthetics, people have begun to pay more and more attention to the shape of the facial structure. Many people go a long way to the beauty salon for double eyelid surgery just to pursue a pair of beautiful eyes. However, protruding eyes are capable of ruining everything. Even the biggest and the most beautiful, once the eyeballs are protruding, it is possible to pull down the face value in a straight line. Therefore, when it comes to protruding eyes, people tend to gnash their teeth and hate it. Some people attribute the cause of protruding eyes to the wearing of glasses, but in fact, it is unfounded and absurd to say so. There are many factors that cause protruding eyes, among which, high myopia, orbital tumor, inflammatory protrusion, vascular protrusion, endocrine abnormality, orbital bone deformity and traumatic protrusion are the main causes of protruding eyes. In people with high myopia, the eyeball is no longer spherical but olive shaped due to the elongation of the anterior and posterior diameters of the eye. The higher the degree of myopia, the larger the anterior and posterior diameters of the eye become, creating a protruding appearance. Intraorbital tumors, such as lacrimal gland tumors and hemangiomas, cause the eyeball to shift out of the orbit toward the less resistant part of the eye because the tumor is crowding the eye, creating a protruding eye over time, and the degree of protrusion may change as the tumor changes. Inflammatory proptosis, on the other hand, is the protrusion of the eyeball due to inflammatory reaction. Commonly, such as ophthalmic fasciitis, orbital cellulitis, cavernous sinus thrombosis, and total ophthalmoplegia, can cause the occurrence of proptosis. Vascular proptosis, most commonly seen in the internal carotid artery cavernous sinus and orbital varicose veins. The former occurs most often after trauma, while the latter is known as intermittent proptosis and tends to have a unilateral onset. Endocrine abnormalities, here mostly referred to as hyperthyroidism. As a result of hyperthyroidism, orbital tissue edema and lymphatic infiltration cause eye protrusion. Hyperthyroidism eye protrusion is mostly bilateral, but also unilateral. The degree of protruding eyes is not necessarily positively correlated with the condition of hyperthyroidism. Most of the protrusions occur at the same time as hyperthyroidism, but they can also occur before hyperthyroidism or after hyperthyroidism goes into remission. Orbital deformities can be congenital or acquired. If the orbit fails to contain the eyeball intact, it can lead to compression of the eyeball, which can protrude away from the orbit. Trauma refers to situations such as orbital fractures or orbital edema. In this case the patient’s eyeball becomes larger than usual or the shape of the orbit becomes unable to contain the eyeball, which can cause it to protrude. Finally, let’s go back to the common misconception that glasses cause eyeball protrusion. This misconception occurs mainly in myopic people who wear eyeglasses. As we all know, eyeglasses (concave lenses) are the most effective and commonly used method to correct myopia. Wearing glasses simply focuses the light onto our retina and creates a clear image of the object. It does nothing else, unlike the fear of “sucking out” the eyeballs that many people have. Eyeball protrusion is only related to myopia and the growth of the eye axis. In fact, wearing good glasses and sending a clear image to the brain will slow down the growth of myopia and help to control the protrusion of the eyeballs.