Correct eyesight is now a very popular laser medical, so we know that itis the principle of what? So radium screen technology of Laser safety glassesfor you to explain its principle, hope to know you have seen after laser vision correction is how one thing. Then let's see what it means.
There is a layer of transparent film behind our most dark eyes, corneal anatomy. The corneal curvature is too large, or with axial length is too long, it will cause hyperopia. But because the corneal refractive index and atmospheric contact, very high, so do little change in the cornea can correct hyperopia, excimer laser corneal curvature is changed after the name change, a corneal refractive power motivation, so that light can assemble in macular, tocorrect hyperopia motivation, which is the fundamental principle of cornea refractive surgery.
First, what is the excimer laser?
The socalled excimer laser is a laser produced by the stimulated two polymer. The result is called excimer, so it is not a solid molecule, is causedby domestic energy aroused a series of physical and chemical reaction has formed but fleeting molecules in the laser gas mixture, its life is only the number of ten nanosecond. Excimer laser is a gas laser pulse, is generated bythe span of 193nm excimer laser, it is a kind of ultra violet laser light inside, the span of the scale to attract narrow laser energy almost completely by corneal epithelial and stromal attraction, is better than a certain sizewill not be attracted to each laser. A laser pulse can cut 0.2 to 0.25um thick biological tissue, so it will not damage the surrounding tissue.
Two, the operation is which part?
The laser eye surgery, said the excimer laser in situ keratomileusis. There are five layers of the cornea, the excimer laser on the next layer of the cornea (the thick) to make a change in the curvature of the state. The excimer laser has no penetrating power, but it can break the chemical bonds of the object, break the current tissue, and use the principle to change thestate of the cornea. Daobai, surgery is the mirror degree do your eyes, to do a small lens in your eyes, reach the goal of eyesight correction.
Three, to what surgery for patients?
Correction of hyperopia, we are the most common step is invisible frame mirror, mirror and excimer laser refractive surgery. Longsighted patients, from children to the elderly, to cover very wide scale.
In high school the previous frame, mirror is the best choice to correct hyperopia. So high school students with previous, the development of the body,the black eye development changes are relatively large, because the need to close one eye, a large number of hard to imitate, refraction balance hyperopiapatients with solid, not suitable for fast hyperopia surgery, with the proposed framework mirror.
The 18 year old, stature gradually strong, imitate the mission increased, refractive status gradually stabilized, can consider to do excimer laser refractive surgery.
In clinic, the scale of refractive surgery is 18 years old and 50 yearsold. At the age of 50 at present, because of the unwarranted presbyopia presbyopia, even to refractive surgery, can not be reached completely remove eye, nor do normal hyperopia refractive surgery, refractive surgery to patients withweak eyes after surgery, the ability to reach the goal of universal vision. The presence of the patient's own eye diseases such as cataract, keratitis, cataract, keratoconus, retinal detachment and other diseases, it is not suitablefor fast refractive surgery.
Above is the radium screen technology of Laser safety glasses for us, to explain the principle of the mean eyesight correction of laser. Expect everyone to be seen after the support for everyone, then we want more understandingof the laser on the above common sense and meaning. Please pay more attention to us.