-1.00 means 100 degrees of myopia, and 100 degrees of myopia is a relatively low level of myopia. If it is -100 degrees in a 6-7 year old child, it is not a very low level of myopia. This is because myopia increases rapidly as a child grows and develops. If no preventive measures are taken, a 6-7 year old with 100 diopters of myopia may develop 800-900 diopters by the age of 18 or so. Therefore, if you have a child with 100 degrees of myopia, it is important to follow up with them on a regular basis. If the annual growth rate exceeds 75-100 diopters, preventive and control measures should be taken to control the growth of myopia, such as wearing OK lenses or using low concentration atropine drops can prevent and control the growth of myopia. If an adult has 100 degrees of myopia, it usually does not affect the ability to see with both eyes, and can usually meet the daily needs, so whether or not to wear glasses mainly depends on their own needs. If your own needs can meet your vision needs, you can go without eyeglasses. If you have difficulty seeing with both eyes, you can also get a pair of glasses for daily wear.