Refractive errors include myopia, hyperopia, presbyopia, astigmatism, and amblyopia. If it is myopia, concave lenses should be used; convex lenses are used for hyperopia; astigmatism requires cylindrical lenses. If it is strabismus, the appropriate prism should be used. In the case of amblyopia, pupil dilation, optometry, and fitting glasses should be performed, along with active amblyopia treatment. When these conditions occur, proper eye care should be maintained, including adequate rest, reducing close-up activities, avoiding eye strain, regularly revisiting the doctor, and frequent checks and corrections for vision are necessary.