The left eye is 4.9 and the right eye is 5.0, and the comparison table is 0.8 for the left eye and 1.0 for the right eye, which is usually normal vision, but it needs to be analyzed on a case-by-case basis and cannot be generalized. Normal adult eyesight is between 0.8-1.5, and corrected vision, i.e., vision with glasses, is considered normal at 0.8-1.5. In the case of children, depending on their age, there are different vision ratings. 3-4 years old, vision between 0.5-0.6 is normal; 4-5 years old, 0.6 or more is normal; after the age of 5, vision can slowly reach 0.8-1.0. In addition, the main way to determine whether vision is normal or not is through optometry, depending on how much the refractive error is. Some children’s vision can reach 0.8, but they may be farsighted, because of the strong adjustment ability, they can see 0.8 or 1.0, but they are easily fatigued, which also needs to be paid attention to. It is recommended to standardize and rationalize the use of eyes in general, avoid using eyes in bright or dark light for a long time, keep enough sleep, and you can do more sports such as badminton and table tennis to exercise eye acuity.