If a child’s 300 degrees of myopia is the degree derived from a regular dilated eye exam, he or she should wear glasses. The child is myopic and has experienced myopia, but some parents think that wearing glasses will affect the child’s appearance and is inconvenient, and are also worried about the growth of myopia, so they blindly avoid wearing glasses and refuse to give the child an optometry prescription, hoping to get treatment through physical methods to change the 300 degrees of myopia. However, if the myopia is 300 degrees from the dilated eye exam, it is theoretically incurable and requires glasses. However, there are various options when it comes to glasses, such as functional myopia glasses that can inhibit the development of myopia. You can also consider wearing keratoplasty lenses to correct myopia by wearing them at night and taking them off during the day, which can also facilitate your child’s activities.