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From the end of June, this distress can be solved. An iris positioning and tracking technology device representing today's most advanced high-tech technology was introduced to Hangzhou by Zheng Lishi Ming Ophthalmology at the end of last month, and it can serve myopia patients at the end of this month. Automatic tracking of eyeball rotation LASIK (excimer laser technology) for the treatment of myopia has been improved several stages since its birth. The current laser equipment already has 3D or three-dimensional tracking technology. During the treatment, the computer can actively recognize the pupil center of the human eye and perform accurate laser ablation after locking. However, in addition to the movement of the human eye up and down, left and right, and back and forth, there is also a rotary motion, which is a big problem that cannot be solved by the three-dimensional tracking technology.
Another problem is that the position of the human eye is different when sitting and lying down, and the human eye will be externally rotated by 2.2 to 15 degrees when lying down. In order to solve the problem of rotation, scientists have invented the iris positioning wavefront laser system through unremitting efforts. At present, Zheng Lishi Ming Ophthalmology has taken the lead in introducing the advanced equipment in China, and will carry out the LASIK technology of iris positioning wavefront aberration guidance. Serve myopia patients with high visual quality. Avoiding sequelae and other sequelas Wavefront is a technology developed by NASA to improve the aberrations faced in long-distance photography for clear astronomical photos.
This technique can effectively reduce the complications of traditional LASIK after the application of myopia treatment, and the postoperative visual quality is perfect. After the traditional LASIK surgery, some patients may experience irregular astigmatism, glare, halo, night vision loss and other phenomena that affect visual quality. The wavefront LASIK avoids these sequelae.
The reason why the eye has vision defects is because there are 85% of low-order aberrations and 15% of high-order aberrations. Even people who have corrected low-order aberrations such as myopia, hyperopia, and astigmatism by wearing glasses are still common. There are high-order aberrations, so the visual quality is not perfect. Traditional LASIK surgery can only remove low-order aberrations and cannot remove high-order aberrations. Therefore, even after postoperative visual acuity of 1.0 or more, some patients may have sequelae such as glare, halo, and night vision. Wavefront LASIK technology removes both low-order and high-order aberrations, resulting in higher postoperative resolution and even better vision and visual quality than wearing glasses.
Human vision can reach 3.0 scientists, in fact, the biological limit of the human eye retina should be 3.0 to 4.0. In other words, if the human eye has a perfect refractive system, human naked eye vision should be around 3.0. Since the human eye aberration makes the optical system of the human eye imperfect, it hinders the human eye from making full use of the retina resolution (photosensitivity). In the absence of low-order aberrations (referring to myopia, hyperopia, astigmatism), the human eye has a visual acuity of only 1.0 to 2.0. If high-order aberrations (referring to coma, shadow, etc.) are eliminated, humans can achieve extraordinary vision of 3.0 to 4.0.
However, because the human eye has various aberrations, such as spherical aberration, defocus, astigmatism, and coma. Therefore, the eyesight of the human eye is only 1.5 or less, and such aberration is not corrected by a refractive correction instrument such as glasses. The overall aberration of the human eye after traditional LASIK has increased more than 5 times than before surgery. However, after the traditional LASIK examination of the correction results by the eye chart is far from being able to judge the visual quality, because the eye chart only provides rough information on the accuracy of the eye's refractive power, more details are ignored.
The same is true for two people with corrected visual acuity of 1.5. Their true visual quality may vary greatly. Although they can distinguish the opening direction of the letter "E", the letter "E" may be clear in their eyes. The boundaries are distinct, the other is fuzzy, and the boundaries are atomized. Iris positioning wavefront-guided LASIK is dedicated to removing both low-order and high-order aberrations. Adapting to a wider population of irises, the wavefront-guided aberration-guided LASIK adapts to a wider population.
"Keep your eyes, don't move your eyes!" When laser treatment of myopia surgery, doctors often do this. Some patients answered pitifully, what can't be done?