With unmatched accuracy and safety, new lasers can carve your cornea to the nearest micron. The results will be fantastic just after few hours without eye glasses or the lenses. Are these laser techniques very recent? Are they fully reliable? Let’s discuss What the laser do in ophthalmology? The laser has existed since the year 1970 including the laser argon (noble gas), widely used in the prevention of retinal detachment. It is a tool for the treatment of diabetic retinal vessels, where it change to a solid or semisolid state altered by the disease. As for refractive surgery, that is to say the correction of vision defects like myopia, hyperopia, astigmatism and presbyopia and in some cases it benefits the progress of new lasers. In 1991 the advent of laser "Lasik "that corrects visual defects in a few minutes while the patient recovers within a few hours normal vision has contributed to the development of this surgery. Invention of laser "femtosecond" (so named because it generates pulses as short a fraction of a second) in 2003 took it to the new level. There are more than mechanical cutting of the cornea with a keratome (automated microsurgical small plane). Everything is done in the laser at micron (1 / 1000 of a millimeter). "So lasik surgery with the femtosecond laser is going to give you the most accurate and better sight just after few hours of procedure performed, the surgical visuals defect today is an early success in the world.†Explanations- Laser surgery practice The most current intervention takes place in two stages each with its own laser. First the surgeon cuts a thin flap of cornea with the laser "femtosecond". No scalpel, absolute precision. â€Previously, the mechanical cutting of the corneal flap also gave good results, but it could sometimes be the cause of some complications.†The strip remains attached by a small top hinge, it can rise as a small cap, hence it is named "corneal flap". It then accesses the deeper layers of the cornea. The second laser on the scene, the excimer laser is a mixture of fluorine and argon and performs work to reduce tissue. "The first laser will cut and the second will carve, laser emits a beam of cold rays, there is no risk of burning. It allows the removal of a microscopic layer of tissue at the target, thus changing the power of convergence" The laser planes micron by micron. To reduce myopia, it acts at the center of the cornea. To reduce hyperopia and astigmatism, the laser acts on the periphery. The surgeon then folds the corneal flap and starts repositioning. No need to suture the hood soon to adopts the shape of the cornea. â€The art â€100% laser Lasikâ€, which combines excimer laser with femtosecond laser was unanimous specialistsâ€. The excimer laser is equipped with an eye tracker; it is a control system that tracks an involuntary movement of the eye. If the subject becomes aware of excessive movement, then the laser stops immediately. But in general the patients focus the color wisely and in 30 or 40 seconds, he/she do not have time to get tired and the procedure is painless. It operates both eyes one after the other. The positive effects of laser vision correction can be seen after only a few hours! The laser is also useful to make some presbyopia The surgery for presbyopia also proposes new techniques, whose common goal is to increase the optical power of the eye for near vision. In some presbyopia, the laser can produce a bulging of the central cornea supposed to promote both the vision of far and near. Another method is to obtain an alternate vision as in contact lens wearers. One eye for distance vision and second for near vision. Finally, there are lens implants that require removal of the lens. But in the field of presbyopia, the quality of vision is sometimes disrupted by the halos at night (less than 10% of cases).
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