For children over the age of 5, a visual acuity of 0.5 is often abnormal. Common causes are mild myopia, astigmatism or amblyopia, etc. The diagnosis can only be confirmed through comprehensive ophthalmology and dilated eye examinations. If it is true myopia, you need to correct bad eye habits in daily life, avoid excessive eye use for a long time, and let your eyes rest for 10 to 15 minutes after working for an hour. At this time, you can look out of the window or do eye exercises to make your eyes fully relaxed. It is recommended to maintain a good posture when working and studying, which not only relaxes the neck muscles but also helps to relieve eye fatigue, etc. Adjustments are also recommended in the diet. It is recommended to increase protein intake and reduce the amount of carbohydrates in the diet. It is recommended to eat less food high in sugar because too much sugar will produce a lot of acid in the body’s blood, which will easily lead to a decrease in blood calcium in the eye and affect the toughness of the eyeball wall. It is recommended to eat more foods rich in vitamins, such as carrots and red dates. If you have eye fatigue, you need to rest in time and follow medical advice to use eye drops or warm water hot compresses around the eyes. Adherence to a period of time can relieve eye fatigue, for the recovery of vision also has a good effect. After a period of adjustment of daily life, if the vision is still at the same level on review. A dilated eye exam is needed to determine if the vision is true myopia or pseudomyopia. True myopia should generally wear glasses to avoid further aggravation of vision.