Eye vision of 5.0 is normal. There are usually two standardized scales for vision tests. The Chinese Visual Acuity Scale (CVAS), also known as the five-point scale, is used for a visual acuity of 5.0. Another type of vision chart is the International Vision Scale, also called the Decimal Vision Scale. Visual acuity tests are usually based on a standard of 5.0 or 1.0, and a visual acuity of around 5.0 or 1.0 is generally considered normal. However, vision fluctuates, so a visual acuity between 0.8 and 1.0 or between 4.8 and 5.0 is usually considered relatively normal. If your vision is lower than 0.8 or 4.8, you need to pay attention to it. You should pay attention to the time you spend with your eyes, and avoid looking at electronic products such as cell phones and computers for a long time, which may cause eye fatigue. And you should check your eyesight regularly. Once you find that your eyesight has decreased, you need to go to the hospital for an eye examination, such as optometry, to find out whether you have nearsightedness, farsightedness, astigmatism, and so on.