How long can a pair of orthokeratology glasses be used?

At work today, I happened to meet two patients who had their lenses changed. A patient wore the lens for a long time, and the service life of the lens was two and a half years. He hasn't reviewed for over a year. In the afternoon, she complained of poor eyesight, unclear radian of fluorescein evaluation, and increased myopia by 75 degrees. When trying on lenses with the same tightness, the fluorescein evaluation is good and the boundary is clear.

From this situation, it is obvious that the lens will be deformed and the force will be weakened if it is used for too long. Another patient complained of changing glasses for one year and four months. Because he is 600 degrees worried about the long lens time and poor myopia control effect, his vision can still reach 1.0 in the afternoon.

Compared with the standard film, the fluorescein evaluation is good, the diopter of the right eye does not increase, and the diopter of the left eye increases by 25 degrees. From this case, it is shown that replacing lenses in normal period can ensure myopia control effect and naked eye vision.

To sum up, the orthokeratology lens needs to be replaced regularly, the cycle is about 1 to 2 years, preferably not more than 2 years.