The main method of checking your eyesight is a vision chart. There are two types of visual acuity charts: the distance visual acuity chart and the near visual acuity chart, and the distance visual acuity chart is commonly used in hospitals. Distant visual acuity table is generally standing at a distance of 5 meters, look at the visual acuity table on the “E” word in various forms of the opening direction, cover one eye to check the other eye, from top to bottom, until it is difficult to see, the last line is the visual acuity of this eye. The normal range for the naked eye is 1.0 and above. The same is true for near vision charts, but they are tested at a distance of 30cm. If you can’t read the top line of the chart, you need to walk forward or count your fingers, which indicates poor vision. Check vision need to go to a regular hospital, vision check abnormalities need to be further perfect optometry and other tests, usually should pay attention to develop good eye habits.