How many degrees is normal vision?

Normal adult vision should reach uncorrected vision of 1.0. Normal vision of children in different age groups in China is 0.4~0.5 at the age of two, 0.5~0.6 at the age of three, 0.7~0.8 at the age of four, 0.8~1.0 at the age of five, and 1.0 or above at the age of six. If you want to clarify your vision, you can judge it by seeing an ophthalmologist.