Q value is an index of corneal aspheric shape. Our hospital took the lead in introducing the German Zeiss excimer laser therapeutic instrument with the high-tech function of "Q value optimization" in southwest China, and reshaped the perfect shape of cornea with personalized surgical plan. "Q value optimization" can effectively avoid postoperative glare and night vision decline, and achieve perfect vision. It is suitable for anyone with myopia, hyperopia and astigmatism who can undergo LASIK/ knife-less correction.

We usually do LASIK/ knife-less correction surgery to correct low-order aberrations, including myopia, hyperopia and astigmatism, but not high-order aberrations. Wavefront: at a certain point in time, the points in the same phase in the vibration propagation direction can form a surface, which is called wavefront. Compared with the ideal spherical wave, the wavefront formed by the matrix trajectory of light can find the deviation between them, which is called wavefront aberration. The individualized way under the guidance of wavefront aberration is to design the best cutting scheme according to the different eyeball aberration data of each guest. During the operation, the analysis system of eyeball aberration instrument is connected with excimer laser treatment system, which completely corrects the higher-order aberrations of human eyes and obviously improves the postoperative visual quality. The WASCA wavefront aberration acquisition system we are using now is the most accurate wavefront aberration detection instrument at present, which can collect data of 650 points, and the pupil diameter is 6mm, which is much higher than other wavefront aberration instruments. Higher-order aberrations are aberrations other than spherical myopia (simple defocus) and cylindrical myopia (astigmatism), which have a subtle but noteworthy effect on vision. Because ordinary LASIK can't correct this aberration, some people will have glare, halo, visual fatigue and decreased vision at night after operation. This phenomenon can be avoided by surgery guided by wavefront phase difference.

These two are additional surgical methods and must be done together with myopia surgery.

After adding these surgical methods, the postoperative effect will be better. If it is added during the operation, the effect can be seen after the operation.

How long does it take for postoperative glare and night vision loss to completely disappear?

According to the individual differences of each person, the postoperative performance is also different.

How long does it usually take? The recovery period is within one month after operation, but about one year after operation.