What you need to know about laser vision correction?
Poor vision is not a sentence. Modern medicine can help get rid of glasses and look at the world with different eyes, to see all its colors. If you want to improve visual acuity, pay attention to such a procedure as laser vision correction. But first find out if it will suit you.
Description of the procedure, the technology used
Visual impairment occurs due to abnormalities in the structure of the cornea. Because of such violations, visual images are distorted, blurred, enter the brain in an incorrect state and are not perceived correctly. The task of laser correction is to eliminate the curvature of the retina: a laser beam contributes to the evaporation of a thin layer, restores a flat surface. The angle of refraction of the light rays changes, and the flow is directly focused on the cornea. As a result, a person sees better and more clearly.
Several laser correction technologies are used:
- Photorefractive keratectomy (PRK).First, the corneal epithelium is removed with a special tool in the form of a spatula, then manipulations are performed using a laser beam. As it is assumed that the integrity of the tissues is disturbed, the recovery period takes several days, during which the patient may feel pain and discomfort.
- LASEK. With a surgical instrument (trephine) a thinnest flap is formed from epithelial cells and an alcohol solution, which is reliably fixed to the cornea by a special lens under the influence of a laser.
- LASIK. The technology involves the separation of a thin epithelial layer from the surface of the cornea, which is set aside like a book page (using specialized tools - a laser or microkeratome). Then the laser beam evaporates the curved areas, after which the flap returns to its place, healing begins.
The choice of technology is carried out by a specialist after examining the patient. All features of the structure of the organs of vision are taken into account.
Indications for correction
The procedure of laser vision correction is shown in such cases:
- myopia (myopia) with a degree from -1 to -15 diopters;
- hyperopia (farsightedness) degrees from 1 to 6 diopters with a + sign;
- degree astigmatism from +/- 1 diopter to +/- 4.
Laser correction is recommended for people whose professions exclude the possibility of wearing contact lenses or glasses. These include rescuers, police, military, firefighters.
To whom the procedure is not suitable?
The procedure has contraindications, which include:
- rapidly progressing pathological changes, sharp deterioration of vision (the results of the operation can not be predicted, it is impossible to guarantee a positive expected effect);
- age up to eighteen;
- advanced age (over 50-55 years);
- dystrophy (pathological thinning) of the retina;
- periods of breastfeeding and pregnancy;
- diseases of autoimmune nature;
- acute inflammatory diseases of the organs of vision;
- common acute infections, inflammatory processes in the body;
- retinal disinsertion;
- decompensated diabetes.
Preparation for laser correction
Before carrying out laser vision correction, a full examination of the patient is required, during which indications and contraindications to the procedure are identified, the corneal structure is evaluated, and risks for the patient are analyzed.
Preparation involves the observance of several rules:
- Mandatory blood tests for hepatitis and RW (syphilis).
- Two weeks before the scheduled surgery date, stop using contact lenses.
- Do not drink alcohol for two days before the correction.
- Day before the operation, do not apply cosmetics on the eyes and face.
Laser correction is performed using local anesthesia in the form of specialized eye drops with anesthetic effect. The patient lies on the couch, taking a horizontal position. The eyelids are opened and fixed by dilators in order to avoid blinking during the operation.
A specialist brings an apparatus with a microkeratome surgical knife to the eye. Is exfoliation of the epithelial flap, its abstraction to the side. Then the laser beam begins to evaporate the pathologically curved and uneven areas. The impact usually lasts no more than a minute. Further the flap returns to the retina and is fixed on it, which is achieved due to the large amount of natural collagen present in the eyeballs.Healing occurs in a short time and without scarring.
The surgeon observes all manipulations through the optical apparatus, controls the operation of the knife and the laser. The procedure takes 15-20 minutes.
Within a few hours after the end of the correction, it is recommended that the patient be in the clinic to assess the state of the cornea. The first day may have discomfort: cramps, burning, feeling of the presence of a foreign body.
Recovery is short, usually takes from three days to a week, after this period, one hundred percent of the vision returns to the patient if the procedure was carried out successfully. During rehabilitation it is important to follow the instructions of the doctors:
- The first few days apply the eye drops recommended by a specialist.
- Day do not touch the operated eyes, three months, do not expose them to friction, mechanical stress.
- For three days after the correction, do not wash your hair or wash your face.
- If a course of antibiotic therapy is prescribed, go through it, and do not drink alcohol during treatment.
- Avoid direct exposure to ultraviolet rays: do not visit mountainous areas, sun beds, beaches.
- Do not dive, do not drive a car in the dark, do not use cosmetics.
All advantages and disadvantages
Advantages of laser correction:
- Minimal trauma. The procedure is minimally invasive, the integrity of the tissues is not severely disturbed.
- Painlessness The patient may feel discomfort, no pain.
- Minimal risks of medical errors. Manipulations are carried out with high-precision modern equipment.
- Security. Modern equipment has multi-level protection systems and precise settings to avoid failures and to find the best gentle effect.
- Short operation time.
- Local gentle anesthesia.
- Outpatient care, the ability to return home on the day of surgery.
- The solution of various problems, the elimination of common pathologies.
- Predictable results, the risks of complications are minimal and amount to 1%.
- Short rehabilitation period.
- The ability to restore one hundred percent vision, getting rid of lenses and glasses.
- A rather high cost of the procedure is about 30-40 thousand rubles, depending on the problems to be solved.
- The presence of contraindications.But they have all surgical interventions.
- Probability of complications due to low specialist qualifications, faulty or obsolete equipment, incorrect selection of tool sizes. Such consequences as puffiness, inflammation, deterioration of vision, retinal detachment are likely. It is important to contact clinics with an impeccable reputation and to experienced doctors.
If you decided to laser vision correction, now you know everything about the procedure and will be able to prepare for it according to all the rules.
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