To return good vision and say goodbye to glasses and contact lenses forever - a dream of many people. Now it can be made reality quickly and safely. On the new possibilities of laser correction of vision - a fully contactless technique Femto-LASIK tells the leading ophthalmic surgeon clinic Excimer in Moscow, a doctor of the highest category, Doctor of Medicine Professor Kirill Pershin.
- Kirill Borisovich, to begin with, explain, please, why does laser correction improve the vision?.
- The human eye - a complex optical system. The rays of light pass through the refracting media of the eye, focusing images of objects on the retina, which are then transmitted to the visual divisions of the brain through the optic nerve. If the refractive power of the optical system of the eye does not correspond to its size or shape, then the image is not focused on the retina, but in the plane before or behind it, as reported by the Internet publication for girls and women from 14 to 35 years old Pannochka. net The image turns out to be fuzzy or distorted, and in this case they speak about refractive error anomalies - nearsightedness, farsightedness. Another visual impairment is astigmatism, in which image distortion occurs with different refraction of rays along the vertical or horizontal axes. During the laser correction the shape of the cornea changes, due to this the image begins to focus on the retina as it should be normal, and the vision becomes clear.
- How is the correction done by the Femto-LASIK method?.
The fact is that laser correction of vision is carried out in two stages: the first - the separation of the finest surface layer of the cornea, the so-called flap. It opens access to the middle layers of the cornea, on which the laser is exposed, and after correction is fixed due to its own collagen. The second stage is the actual laser correction, that is, the action of the excimer laser on the inner layers of the cornea to simulate its new shape. And if in the other methods the first stage - the formation of the flap - was performed with the help of mechanical instruments, then by the method of Femto-LASIK the corneal flap is formed by a femtosecond laser. That is, no mechanical effect on the cornea occurs, it is completely, 100 percent laser correction. Using a femtosecond laser, you can specify any parameters for the superficial flap depending on the individual characteristics of the eye structure of the patient, and as a result, a smoothly smooth flap with a smooth surface. This is possible due to the unique features of a femtosecond laser. Its beam can be focused at a given depth, stratifying the tissues at the molecular level.
- And what does this give the patient? After all, the person who decided to make laser correction, the most interesting question is: how he will see?.
- The Femto-LASIK method is not only high technologies and more sparing influence on the cornea, it is first of all the reception of qualitatively other visual characteristics. This technique is suitable for those who make high demands on the quality of visual life. Femto-LASIK allows you to achieve maximum results in many ways: not only in visual acuity, but also in contrast, sharpness, adaptation in conditions of limited illumination, absence of optical distortions. Femto-LASIK is really an individual correction of vision, when even the slightest features of the patient's visual system are taken into account. The result of correction is absolutely predictable.
- Who can carry out correction on this technique?.
- Femto-LASIK extends the possibilities of laser correction. We can correct myopia to minus 12 diopters, farsightedness to plus 4, astigmatism to 6. Thanks to this technique and, above all, the femtosecond laser, we became less dependent on the anatomical features of the patient's eyes. And if people with a thin or convex cornea were previously forced to refuse correction, now they can carry it out.
- People initially are wary of everything new. Did this technique confirm its safety?.
- You can not call this technique so new: in the US and Europe it has been used for about 10 years, more than 2 million successful operations have been carried out. The possibility of the appearance of postoperative complications is now considered as purely theoretical. By the way, in the US only this technique is widely used to correct vision in people of extreme professions, for example, astronauts, athletes, pilots. Therefore, the level of trust in this technology is very high all over the world.
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