I. The number of children and adolescents with monocular myopia in outpatient clinics is on the rise. These patients with monocular myopia have certain commonalities upon inquiry: 1. poor lighting of the desk lamp, placed on the left or right side for a long time; 2. tilted head when reading, resulting in unequal reading distance between the left and right eyes; 3. too long reading time at one time; 4. do not think they are myopic, because the vision of both eyes is not too bad and cannot be felt, which eventually leads to late consultation; 5. unwilling to wear glasses, including parents; 6. exotropia 3, advice and suggestions: 1, timely pupil dilatation; 2, timely prescription, giving priority to corneal contact lenses, especially plastic glasses; 3, such as frame glasses, it is recommended that the full correction with glasses, is not recommended to undercorrect too much in one eye; 4, the consequences of not timely treatment: 1, myopia is worse than the eye of the faster rate of progression; 2, strabismus greater chances; 3, the development of visual function of both eyes is seriously affected; 4, affect learning.