At what age is it best to wear orthokeratology glasses?

How long you wear it depends on the permeability of your orthokeratology lens. If many orthokeratology lenses used to have poor air permeability, it is recommended to take them off at noon. Most of them are breathable now, but it is best not to wear them for more than 12 hours. It is recommended to wear it for no more than 4 hours for the first time and no more than 6 hours for the next day. When wearing them, be sure to clean and replace the mirror box regularly. If you don't pay attention, your eyes will get infected or get sty. You can let them rest on weekends.

Orthokeratology is a semi-circular transparent RGP (rigid oxygen permeable contact lens) lens. Myopia patients wear it at night, exerting certain pressure on the cornea, changing its shape and improving their eyesight. However, the shape of the cornea on the front surface of our eyes is not copied by a standard mold, and there will be more or less shape differences. Therefore, eye examination before wearing orthokeratology lens is very important, and only suitable physiological conditions can ensure the safety and effectiveness of wearing it.

Factors affecting myopia control by orthokeratology;

First of all, the first priority of myopia prevention and control is behavior control, such as increasing outdoor activity time and controlling short-distance eye use time. For example, when the eyes are used at close range, the pupil becomes smaller, which will lead to the decrease of luminous flux, aberration and defocus, and the positive defocus protection of orthokeratology lens may become negative defocus. Secondly, it is related to pupil size and pupil shape. The pupil is too small, and the defocus ring formed by orthokeratology lens is not easy to enter the retina, so the myopia control effect is poor. The larger the pupil span, the better the defocused area will enter the pupil area, and the myopia control effect will be better. Thirdly, it is related to the relative position relationship between the pupil size and the defocus ring generated by the inversion arc. If the pupil size is smaller than the treatment area of orthokeratology, the myopia control effect is poor. Most of the pupils are located in the treatment area, and a small part is located in the anti-arc area, which will cause ghost and poor visual quality, but the myopia control effect is good. The pupil is larger than the treatment area, and the defocusing ring is mostly in the pupil area, so the myopia control effect is good. The pupil deviates from most of the treatment area. In this case, poor visual quality may affect corneal health. In this case, although the myopia control effect is good, it is necessary to adjust the film.