Laser correction of the recovery methodof relatively recent. Initially, he did not bring proper results, but some fine-tuning to further improve the method and allowed to increase its effectiveness. This is evidenced by statistics: only 5% percent of patients need a second operation, the rest are satisfied with the result for many years.
Laser vision correction is only effective whenan appropriate level of qualification of the doctor. Therefore, in advance, going to the clinic for consultation, it is useful to know about the operation, indications and contraindications to it, as well as of those moments that will help assess the level of qualifications of the clinic and the doctor in particular.
First of all, it should be remembered that the laservision correction - a correction is instead treated. That is, glasses or lenses it replaces, but not stop the fall of the strength - except when the vision in one eye drops due to the fact that practically no second works.
The main indications are stable (!) Nearsightedness or farsightedness, it is also possible in combination with astigmatism (or mixed astigmatism). Correction possible with myopia up to -10.0 diopters, farsightedness up to +6.0 diopters, astigmatism up to 4.0 diopters. Our website would like to note that individual exceptions are possible, but even then it is not a full and partial restoration of vision. A more significant violations in vision are advised to carry out the replacement of the lens, or other methods of treatment.
Especially laser correction method of showsthose who have problems with contact lenses (for example, due to the professional activity - military, fire, chemical production, etc.); those who have problems with only one eye (then the second, forced to work for two, constantly overwork).
Despite the much-touted benefits of laser vision correction, it is suitable not for everyone.
First, our website will pay attention to those whoIn principle it is not needed. About people with healthy vision speech, of course not. It makes no sense to conduct laser correction for children under 18 years old - they have eyes still growing, changing, and most importantly - no one can predict with reasonable certainty how. The next category - older people who needed reading glasses. The fact that changes of this kind due to the fact that the lens loses its ability to accommodation (ie the ability to switch focus between near and far objects) - that is, even if they do laser correction, the overall situation has not greatly improved - the patient loses the ability to see distant objects.
Border between "not needed" and "no" caseIt is pregnancy. It is not necessary - because this time is the hormonal changes the body, and its background can change the shape of the eyeball. We can not - because somewhere about a year after the surgery contraindicated in severe stress on the body, and labors are.
There is also a set of cases where the lasercorrection can not be carried out because it is relatively high risk of complications. This disease of the cornea (keratoconus, thinning), cataract, glaucoma, rapidly progressive myopia (or hyperopia, astigmatism), infectious eye diseases (eg, conjunctivitis) Correction in days autoimmune diseasesThe only eye svezheoperirovannaya retinal detachment.
Some clinics are also not taken for patients with diabetes or a pacemaker - because there is a possibility of common complications. Such questions should be addressed individually.
By laser correction not permitted in patientsif deviation in vision evolved during the last 12 months. Perhaps you will be offered initially to treat the eye clinic (remove inflammatory processes, "darn" laser retina, etc.) - and only after that (after some time) to make corrections. Healthcare continues to develop, so that more absolute contraindications are moving into the category of "let's treat this, and then make a correction and" every year.
How to choose a clinic
First, we should pay attention tothe reputation of the clinic and its experience and willingness to help you if you have any complications after a few years. A good clinic necessarily provide a guarantee, if not the result, at least the fact that in case of complications, you will get help. The best in this respect - large centers with many years of experience.
The next criterion - own scientificresearch and the amount of funds spent on the purchase of modern equipment (good clinic does not conceal such information). But here, our site would like to dissuade you: do not hurry to become the first patient for new equipment - it is better if the clinic will have statistical data on the effectiveness of its use in their own practice.
You can also pay attention to the clinic staff - if it is really good, it is unlikely her staff will use glasses.
What to choose - known large center ora small cozy private clinic? For classical cases of diseases with no side more conveniently small clinics - there is more emphasis on the individual patient, it is best worked out a psychological component. It is only necessary to pay attention to the history of this particular clinic, as well as the qualifications of its professionals. If you have a more complicated case - it is better to apply to large scientific institute appropriate profile. It is possible, that's where you and send you the chosen clinic if you have a complex case.
And in any case, ask not qualified, "general hospital" a particular doctor who will operate on you.
How it works
To understand exactly how the laser correctionrestores vision, it is necessary to recall the structure of the eye. Without going into details, the eye represents a kind of a conventional camera - instead of the film - the retina, instead of the lens - the lens that can change its curvature, the image focusing precisely on the retina. This is the ideal.
If myopic eye, the image is focusedfront of the retina, if dalnozorok - behind it. With astigmatism, the refractive power of the lens just is not the same for different parts of the visual field - and gets part of the image in front of the retina, and some - for her.
Classic (not laser) methods of correctionstates are reduced to the fact that the optical system is introduced, another lens (glasses or contact lenses) so that the overall parameters matched healthy (that is, the image focused on the retina). When such laser correction lens is essentially cut out from the patient's own cornea, and thus always with him.
Techniques of laser correction
There are several methods of laser vision correction.
PRK (PRK - photorefractive keratectomy) - firsthistorically emerging technique of laser vision correction. It lies in the dosed evaporation of the cornea using an excimer (cold) laser. Actions laser controlled by a computer program. After the operation the surface layer of the cornea heals within 1-3 days after the operation, with the formation of a new optical curvature, and the patient acquires a new vision - but the recovery period can not be called pleasant. In addition, if needed both eyes, then a second operation on the eye is carried out only after the first recovery period (typically a few days) in vision correction, however if possible, other techniques are now preferred.
LASIK (LASIK) - (LASIK, Laser-Assisted in Situ Keratomileusis)- A laser keratomileusis. In this case, the operation is carried out in two stages. First, a special instrument - microkeratome separates the corneal flap (about 1 / 4-1 / 3 of thickness), but not separated till the end - left "leg". The flap is folded to the side, and the next phase of the internal layers of the cornea laser screed in accordance with the computer program. Then the flap falls back into place, and within a few minutes after the operation begins to grow.
Advantages of the method is that duethe integrity of the outer layers of the cornea recovery period is reduced to a maximum of 24 hours, the patient does not experience discomfort. This enables adjustment of both eyes in the same day. Disadvantage - if complications are, it is quite serious, because it will be affected by the deeper layers of the cornea. So much depends on the surgeon's skill and sterility of the operating room. Especially critical for this method, the thickness of the cornea - if it is not enough, you are recommended to other laser correction method.
Super LASIK - The same as LASIK but morethe program - not only smoothes myopia, hyperopia, astigmatism, but also more local and small aberration (measured with a special instrument). Purpose: to bring sight to the theoretical ideal. The problem is that local aberrations are unstable - and thus their correction may be excessive.
REIK - The same as LASIK. The difference in the number of minor technical "know-how". Another name - just a publicity stunt.
EPI-LASIK (LASEK) - (LASEK, LASer Epitheliale Keratomileusis) - thesame as LASIK, with the difference that the flap is not formed from the cornea, but only of its epithelial layer. Thus, Bowman's membrane remains intact, and reduces the risk of complications.
Besides the advantages and disadvantages of eachprocedure has its own indications, depending on the condition of your eyesight. PRK method allows for the correction of vision in myopia (up to -6.0 diopters), hyperopia (up to +3.0 diopters), astigmatism (up to 3.0 diopters). LASIK method and his like can restore sight and large deviations: up to -10.0 diopters - with myopia up to 6.0 - 4.0 and at a farsightedness diopter with astigmatism. The only exception to LASEK method, he indications for surgery for myopia and hyperopia up to -8.0 and +4.0 diopter, respectively. In each case it is possible to use one or another operation for deviations beyond these - but it all individually.
Preparation for the examination and surgery
If you use contact lenses, they should benot to wear (soft - at least a week, hard - at least two weeks) before the test and operation. This is due to the fact that under the influence of the lens corneal shape change, and it takes time to return to the natural form.
Before the surgery can be assigned to a complete blood count, and an analysis of HIV, RW, hepatitis B and C - in order to take the necessary precautions physician if necessary.
48 hours before the operation can not drink alcohol for 24 hours before the operation can not be used in cosmetics eye area (shadows, powder, mascara).
On the day of the operation our site recommends washhead - not only for operations but also because in the next couple of days after surgery is better not to do so. Thoroughly wash your face, do not use perfumes (especially with a pungent odor or alcohol-based), not to wear wool and mohair sweater with a high neck.
If you currently need to have a document proving your identity, and if there is - the results of the previously passed examinations.
Laser vision correction
After verification of the nurse will put you insterile shoe covers, a dressing gown and cap, clean the area around the eyes with a special solution and hold the operating room. In the eyes of your special drip anesthetic drops, then insert lid speculum - a device that allows you to keep an eye open during surgery.
The physician programs the excimer laser inaccording to your data. After that, the surface of the eye special tool will be installed, which will separate the flap from the cornea and take him to the side. You thus do not feel.
After that, the doctor will ask you to look atred light in front and if possible not to move the eye. If stirs - do not worry, just turn off the beam. Just for frequent trips beam operation will take more time.
The impact of the laser can last up to 10 minutes. Pain or any discomfort will not.
Previously separated flap back into place at the end of the procedure, and you are given some time to relax with your eyes closed.
Then the eye is examined for a special slit lamp - it is quality control. Then you special drops to drip and possibly impose a protective bandage or put on a special lens.
In principle, in a couple of hours after the operation youYou will be able to enjoy normal vision (and the best couple of hours to spend in the clinic). But it can be a little vague, and certainly unusual - so our site advises ask a relative or friend to accompany you home. It is also not recommended in the day, get behind the wheel.
The postoperative period
From the appropriate behavior in the postoperativeperiod depends on your vision is not less than actual on most laser correction. The first thing to literally carry all the advice of your doctor. On leaving the hospital, and to medical examination does not touch the eye. Do not drink alcohol at least at first (especially if you drink antibiotics). You may need special protective revile contact lens - In which case it will be given you (and dressed) inclinic. As already mentioned, at least three days after laser vision correction is better not to wash your hair and not wash in order to avoid getting infections. In the case of any unusual sensations in the eye, or the fall of view should immediately go to the clinic.
Two weeks after the operation can not rub the eye,should avoid bright light (use sunglasses and driving a car in the evening), do not use cosmetics for eyelashes and eyelids. our site Please note that after the laser vision correction should avoid contact with eyes, chilled or overheated air (not to stand in the air-conditioned winter stay at home, do not look into the working oven, etc.)
A month after the operation can not be engaged in contact sports, swim in the pool, sauna. There are also some other restrictions - should be discussed with your doctor.
But in general, a month after the operation can return to normal life - if you will not be excluded from it what is harmful and healthy eyes, of course.