Girls 8 years old myopia without glasses, if it is pseudomyopia, the degree may not rise after standardizing eye habits. If it is true myopia, the degree will rise.
For girls 8 years old myopia, you need to go to the hospital in time for dilated optometry examination. If found to be pseudomyopia, just ciliary muscle spasm temporarily, and the degree is not very large, you can not need glasses, as long as the timely correction of bad eye habits, the degree can be stabilized not to rise, or lower and lower.
On the contrary, if it is true myopia, for the 8-year-old girl, if not timely with glasses to correct, with the gradual growth of age, the visual axis will be longer and longer, resulting in higher and higher degrees.
In conclusion, whether the myopia of an 8-year-old girl will increase without glasses depends on the type of myopia, and you can consult a medical professional for advice.