Get rid of refractive errors by using surgical vision correction.
The main principle of this refractive correction method is to change the shape of the patient's cornea, and hence its refractive capacity. In this case, the course of the rays varies in such a way that the focal spot coincides with the retina, which does not occur in patients with farsightedness, myopia and astigmatism. There are many ways to change the shape of the cornea, but the most common - laser keratomyelosis, or LASIK.
Benefits of LASIK
- 80% of patients may achieve the desired visual acuity immediately after surgery. Technologies are constantly being improved, so the indicated percentages will soon be bigger.
- Laser keratomyelosis is practically painless surgery.
- Improvement of vision occurs very quickly, the received results can be estimated on the day of operation or the day after.
- After surgery, there is no need to wear protective eyewear.
- It is possible to conduct a repeated corrective surgery in a few years to further correct visual acuity. But in most cases, as a result of LASIK vision improves so that the patient no longer needs to wear corrective glasses.
Despite the significant advantages, this method of eye surgery also has some disadvantages. Changes made during the operation are irreversible, the former form of the cornea can not be recovered. If necessary, additional corrections can be made only by a repeated LASIK operation.
LASIK is a technically very complex procedure: damage to the part of the cornea, which is peppered during the operation, can lead to visual impairment.
With a favorable outcome of the operation, the only disadvantage will be discomfort in the first 24-48 hours after surgical intervention. Other side effects may include photophobia, halo around the image, difficulty driving at night, blurred vision, dry eye syndrome.
Preparing for surgery
Before surgery, the ophthalmologist must explain to the patient some of the rules of preparation for her and tell about the expected result. After a detailed conversation and collecting anamnesis, the ophthalmologist, with pacemetrii, measures the thickness of the cornea, its refractive capacity, intraocular pressure and transmits the surgeon's data.
If the patient wears gas-permeable hard contact lenses, they must be discontinued three weeks before surgery. All other types of contact lenses can be worn only three days before surgery.
On the day of operation you can not eat heavy food, take any medication, do makeup. In the event of any symptoms of any disease, the operation is better to move.
What happens during surgery
The first stage of the operation is the removal of the upper layer of the cornea, which includes the epithelium and a small part of the core substance of the cornea. This specific section is made using a microkeratome. After that, the formed piece of tissue is pushed to the side, revealing for the laser to influence the main substance of the cornea - stroma. Laser irradiation is carried out within 10 minutes under local anesthesia, at this time it is enough for the cornea to change shape. After this, the separated cornea flap returns to the place, the operation is completed.
Improvement of vision is usually achieved during the first days after surgery. By this moment, the received image may be blurred and foggy. The surface of the eye will tend to dry in the first months after surgery. Eye drops that doctors appoint for this period will prevent the development of infection and injury to the cornea. After 24-48 hours after surgery, you should contact the ophthalmologist again to make sure there are no complications. Observing an ophthalmologist is required within six months after the operation of LASIK.