High myopia refers to myopia of more than 600 degrees, generally do not participate in roller coasters, bungee jumping, parachuting and other stimulating activities, to go diving should not be more than 5m or less, try to pay attention to the habits of the eyes, do not use electronic products for too long time, general use of the eyes for 40-50 minutes, to rest for 5-10 minutes, you can close your eyes or look into the distance. High myopia due to the thin retina, it is recommended to go to the ophthalmology department of the hospital every six months to one year to check the fundus of the eye, if the fundus of the eye appears to be degenerated or cracked, then it is necessary to operate under the guidance of the doctor in a timely manner. As the eyeball becomes too long in high myopia, the eye will look a bit protruding, which is normal and no need to worry too much.