Farsightedness is due to variations in the strength of the regulatory tension, so vision can be good or bad at times. In farsightedness, the adjustment function decreases after middle age, and the patient will wear old-vision glasses earlier than the orthokeratology patient. Since farsightedness is a state of adjustment for both distance and near vision, it can lead to eye pain, headache, and other symptoms of visual fatigue after seeing for a long time. Hyperopia is the cause of amblyopia and internal strabismus. Treatment of hyperopia: Since most infants and toddlers are hyperopic after birth, with the change of the eye to orthophoria, those who are less than 3 years old with 3.50 degrees of hyperopia do not need treatment, and those who are less than 2.50 degrees of hyperopia after 3 years old do not need treatment. If the degree of hyperopia is greater than the above-mentioned standard at each age, or if it is accompanied by amblyopia, strabismus, blurred vision and visual fatigue, it needs to be treated with convex lenses. The degree of hyperopia decreases with age as the eye develops. When the eye axis grows by 1mm, the hyperopia decreases by 3.00 degrees. Therefore, hyperopia patients younger than 4 years old should have their hyperopia checked once every six months, and those older than 4 years old should have their hyperopia checked once a year to see if their hyperopia decreases, and generally at the age of 16-18 years old, the development of the eye is stable and the hyperopia no longer changes.