To see the objects clearly, rays of light pass through the eye and focus on the retina, which constitutes the back wall of the eye. Lens inside the eye is responsible for refracting the rays of light to ensure the best focus. Retina receives the vision formed by the rays of light and sends it to brain through the optic nerve.
The most important symptoms of the fracture errors are low vision, pain and discomfort in eyes. Short-sightedness (myopia and hyperopia), farsightedness (presbyopia), difference between vertical and horizontal refractivenesses of eye (astigmatism) are the names of visual impairments. While vision focuses in front of retina in myopia, it focuses behind in the back of retina and a blurred vision occurs in astigmatism due to focusing on two different points.
Laser therapy is one of the latest treatment methods applied in the refractive errors of eye and eliminating the dependency to contact lens. While LASIK is the most common method, all other refractive surgical methods (iLASIK, WAVEFRONT LASIK-LASEK, PRK ,LASEK, Epi-LASIK, INTACS, Phakic IOL) with proven reliabilities are also being applied in our hospital.
Who can be applied to?
You will primarily be applied a detailed ophthalmologic examination and other tests. If you are currently using contact lens, soft lenses should be removed 1 week and rigid and gas permeable lenses should be removed 3 weeks before the examination. Your refractive defects and eye-glasses numbers will be determined firstly without and then with eye drops. Your intraocular pressure will be measured and particularly cornea and retina will be analyzed through biomicroscope in detail. The corneal mapping, corneal pachymetry, Schirmer test, day and night pupil size measurement and wavefront measurements showing the vision quality will be performed with our state of the art technology product device called PENTACAM.
The purpose of laser eye surgery is to protect the eye health of people and relieve them of glasses and lenses. The success rate of the operation varies from person to person according to the structure of eye due to it is not suited to each eye. Therefore, patient selection must be made correctly and patients must be informed in detail for a successful operation.
Besides, if you have a systemic disease and regularly used drugs during the examination, then you must certainly inform your doctor.
→ People at least 18 years of age,
→ whose visual impairments did not change more than 0.50 D in the recent year,
those with myopia up to -8 dioptrics,
hypermetropia up to +5 dioptrics,
and astigmia up to 5 dioptrics,
→ and people with sufficient thickness of cornea can undergo laser operation.
Who cannot be applied laser?
Laser must not be applied to
→ Patients with rheumatism,
→ Diabetic patients,
→ Pregnant women,
→ Breastfeeding mothers,
→ Those who previously underwent eye surgery,
→ Keratoconus patients,
→ Patients with eye diseases such as high eye pressure and cataract.
What is LASIK?
A thin flap is removed through a special and automatic device called microkeratome from the transparent surface called cornea which is like a watch glass. The purpose of removing this flap is to reach the middle layer of the cornea. Cornea is reshaped as planned by the surgeon through excimer laser under the guidance of a computer program following the flap is formed and lifted up. Then the flap is placed without the need of any adhesive. The total operation time is 10 minutes.
Although sight is good on the 1st day, getting a clear result may take 1 month. A success over 90%-95% may be achieved according to the degree of visual impairment. In case your eye is determined to be still impaired during the control operation performed at least 6 months after the first operation, all examinations and tests are repeated and the former flap is removed without the new one is cut and the 2nd laser operation can be made if, with PENTACAM, the cornea thickness allows for the operation.
What is Custom Lasik?
Lasik can be applied personally according to the cornea structure through a special program called Wavefront. This is a laser application suited for the cornea structure and all optical system of eye measuring the light scatterings and aberrations. The WaveScan analyzer is being used in our center. This method decreases the cases of seeing less at night and light scatterings and enhances the seeing quality.
What are PRK and LASEK?
No flap before laser is formed in cornea in both methods. This is preferred in patients with thin and plane corneas or lower degree of visual impairment at whom lasik surgery cannot be applied. LASEK is a relatively new application which is a modified form of PRK.
PRK is the application of laser to sublayer skinning the thinnest tissue called epithelium on the top of cornea. The differences between LASEK and PRK are epithelium which is removed using alcohol to be put back into its place, lesser pain and the rate of recovery.
In both applications, patients wear contact lens for 3 or 4 days period to accelerate the epithelium’s process to renew itself and protect the eye.
Patients feel watering and increased luminous sensitivity for 2 or 3 days. Vision is blurred during this period. They reach to the clear vision level in 3 or 4 weeks.