Eyes are the windows to the soul, and a pair of good-looking eyes can add to the value of the face. In recent years, with the changing concept of aesthetics, people have started to pay more and more attention to the shape of their facial structure. Many people go all the way to beauty salons to have double eyelid surgery just to pursue a beautiful pair of eyes. However, a protruding eye is capable of ruining everything. Even if they are big and beautiful, once the eyes are protruding, they may bring down the value of the face in a straight line. Therefore, when it comes to protruding eyes, people often gnash their teeth and hate it. Some people attribute the cause of protruding eyes to the wearing of glasses, but in fact, it is not justified and ridiculous to say so. There are many factors that cause proptosis, among which high myopia, intraorbital tumor, inflammatory proptosis, vascular proptosis, endocrine abnormality, orbital bone deformity and traumatic proptosis are the main causes of proptosis. In people with high myopia, the eye is no longer round and 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 eyes, creating a protruding appearance. There are various types of intraorbital tumors, such as lacrimal gland tumors and hemangiomas, which cause the eye to shift toward the outer orbit where there is less resistance, resulting in proptosis over time. Inflammatory proptosis, on the other hand, is the protrusion of the eye due to inflammatory reaction. Commonly, such as ophthalmic fasciitis, orbital cellulitis, cavernous sinus thrombosis, and total uveitis can cause the occurrence of proptosis. Vascular proptosis of the eye is mostly seen in the cavernous sinus of the internal carotid artery and orbital varices. The former occurs mostly after trauma, while the latter is known as intermittent proptosis and is mostly unilateral in onset. Endocrine abnormalities, here mostly referred to hyperthyroidism. Due to hyperthyroidism, the orbital tissues become edematous and lymphatic infiltrate, causing protrusion of the eyeball. Most hyperthyroid proptosis is bilateral, but there are also unilateral cases. The degree of proptosis does not necessarily correlate with hyperthyroidism, and most of them occur at the same time as hyperthyroidism, but they can also occur before or after the remission of hyperthyroidism. Orbital malformations can be congenital or acquired. If the orbit is unable to contain the eye intact, it can lead to compression of the eye, which can protrude out of the orbit. Trauma refers to situations such as orbital fractures or intraorbital edema. In this case the patient’s eyeball becomes larger than usual or the orbit becomes too shaped to contain the eyeball, which can cause it to protrude. Finally, let’s go back to the misconception that “wearing glasses will cause the eyeball to protrude” that we all fear. This misconception mainly occurs when people with myopia wear glasses. As we all know, glasses (concave lenses) are the most effective and most commonly used method to correct myopia. Wearing glasses only focuses the light on our retina and creates a clear image of the object. They do nothing else, unlike the “sucking out” of the eye that many people fear. The protrusion of the eyeball is only associated with 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 control the protrusion of the eye.