Seeing things a little clearer when squinting generally means that the patient has developed myopia because the lens changes shape when a person is squinting and thus will get a clearer image. The most correct way is to advise the patient to go to the ophthalmology department of a regular hospital in time to have a standard optometry examination to check which kind of refractive error the patient has, and in the case of adolescent patients, it is recommended to make sure to have a check-image optometry with ciliary muscle paralysis. Some patients are unaware that they have myopia, and if they do not go to the hospital for examination and cannot adjust themselves, they will form the habit of squinting to see things over time, which will make the muscles of the eyes overly tense and cause visual fatigue very easily, and also increase the wrinkles around the eyes, which will increase the feeling of aging, and it is very important to wear the right glasses.