A visual acuity of 5.0 in the eye is equivalent to a visual acuity of 1.0, which is the normal range of visual acuity, but cannot be inferred from the patient’s visual acuity. The patient’s visual acuity of 5.0 in the eye is the visual acuity expressed by the five-point visual acuity recording method, which is equivalent to a visual acuity of 1.0 in the decimal visual acuity recording method. The average adult has a visual acuity of 1.0 as well as 1.0 or higher, as patients with a visual acuity of 1.0 are within the normal range of vision. People with normal vision can consume foods rich in vitamin A and liver cleansing and brightening, such as carrots, fish oil, goji berries, chrysanthemum tea, etc. They also need to develop good eye habits, such as maintaining correct sitting posture, controlling eye time and avoiding eye fatigue. And you can also appropriate amount of massage around the eyes to relax the eyes, avoid prolonged use of cell phones, tablets, TV and other electronic products, do not use the eyes in the bright light or low light, do not play the phone lying in bed and so on. It is recommended that patients with vision loss consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.