LASIK (Laser Assisted in-Situ Keratomileusis)

The term LASIK is an abbreviation of ‘Laser Assisted in-Situ Keratomileusis’. LASIK is the ultimate and most precise method of refractive eye surgery utilizing laser technology known to mankind today. The Lasik technique encompasses two main phases:

1- flap shaping (removing the epithelium layer located at the forefront of the corneal tissue, and the Bowman layer by using power-operated microkeratom (a special blade) or femtosecond laser;
2- Reshaping of the cornea (the middle layers) performed by excimer laser, the most accurate laser tool invented by human.

When phase two is completed, the removed flap is returned back to its original place and well-adhered due to the liquid pump existing in the cornea.

The method is applied to permanently cure nearsightedness (myopia), farsightedness (hypermetropia) and astigmatism. Lasik is a most reliable and widely used refractive surgery with proven results and short recovery period. Several diversities of the Lasik technique have been developed to treat more effectively the various forms of visual impairments such as:

Intralase LASIK (Femto Lasik)

Intralase LASIK incorporates the same technique applied in standard Lasik procedure however instead of microkeratom blade, a femtosecond laser is used for formation of the flap. The process allows the surgeon to design preoperatively and create the perfect flap in terms of position, diameter and thickness. This way any risks of creating of an irregular flap are minimised to zero. The femtosecond laser accumulates bubbles with the size of 1-3 micron, made of carbon dioxide and water helping the corneal tissues easily to disintegrate creating a customized flap. Compared to standard Lasik, the Intrlase incision is much thinner resulting into much shorter healing time and reduced discomfort. This treatment method may be recommended to patients with certain irregularities of the cornea.

LASEK (Laser Assisted Sub-Epithelial Keratomileusis)

LASEK is a refractive surgery technique developed as a surface ablation method similar to PRK that compared to it generates less discomfort, reduced corneal haze occurrence plus faster recovery time. Unlike the PRK where the epithelium is being removed, in LASEK epithelium is not removed at all, rather slightly folded out of the scope of laser operation with the help of an alcoholic solution. Once the cornea has been properly shaped, the surgeon folds back the epithelial layer in its original place. Visual recovery is generally faster than PRK, but significantly slower than Lasik.

Wavefront Lasik (C-Lasik or ‘Eagle Eye Lasik’)

The Wavefront technique also known as ‘Customized Lasik’ or “Eagle Eye Lasik” is suitable and successfully applied on patients with corneal irregularities such as astigmatism. The purpose of applying this method is to achieve enhanced level of vision and reduced night vision side effects. A device called Wave Front Analyzer (Aberometry) is being deployed to perform a full scan of all layers of the eye. As a result a detailed map of all irregularities and fluctuations is being created and later transferred and programmed to the laser apparatus which on its end will perform a customized treatment for each eye. Maps generated by the wave front analyzer are comparable to finger prints and are unique for each patient. This way a fully-customized treatment is performed, guaranteeing better results for the treated eye.

OPDCAT (Q Mode Lasik) – OPD (Optical Path Difference)-guided customized aspheric treatment

OPDCAT is safe and efficacious way for treatment of myopia with and without astigmatism. This method is used to limit the induced spherical aberration by the use of aspheric ablation profiles. PODCAT technique is greatly appreciated for its potential to maintain preoperative levels of visual quality. The process of defining the ideal form of the cornea can be assisted with a method called Q-mode or F-CAT. If the wavefront map cannot be validated, and if the main aberration is spherical, the target Q value (asphericity) is entered to further refine the ablation profile. The application of this treatment does not differ from standard Lasik procedure. The difference is only in the preparation process of the shape that the laser will create on the cornea.

Monovision Presbyopia LASIK

Monovision has been applied successfully for over 20 years with contact lens correction and various types of refractive surgery. With Monovision one eye is corrected for better distance vision, and the other eye is corrected to enhance near vision. The brain tends to suppress or filter out the image from the eye that is not on clear focus. Many people cannot adapt to this kind of sight, which can cause problems like loss of depth perception. We advise patients to sample monovision lenses first to see if they like it before going for a monovision lasik operation.

Multizone LASIK (Multifocal Lasik or PresbyLasik)

Multizone LASIK is a new advanced laser technique for correction of presbyopia that remodels the cornea’s shape to create multiple power zones enabling good vision at various distances. The multifocal corneal correction allows both distant and near refractive errors to be adjusted since light in each power zone is refracted differently. An excimer laser reshapes your cornea into zones for near, intermediate and distant vision. Your brain then picks the zone providing the clearest vision, depending on object’s location. Multizone Lasik produces better results compared to patients that have undergone mono-vision correction.

IntraCOR (Flapless Intrastormal correction of Presbyopia)

IntraCOR is a flapless laser treatment of Presbyopia, performed by the sole use of a high-tech Technolas femtosecond laser. This is the most innovative refractive surgery method developed in the last 20 years. Unlike other laser assisted eye treatment techniques, IntraCOR is performed without making a single surgical incision through the surface of the cornea thus keeping the epithelium and endothelium intact. The femtosecond laser creates minor changes inside the stroma (cornea’s middle layer), by forming a series of precise, microscopic concentric ring patterns, thus altering cornea’s shape, but not its overall thickness. The cornea’s steepness is adjusted to provide better close-up vision. Compared to other presbyopic laser techniques such as monovision LASIK or presby-LASIK, IntraCOR does not affect depth perception, contrast sensitivity and steropsis, the recovery period is much shorter and any flap related complications such as infections are overruled. Taking only 20 seconds to complete, the INTRACOR is a gentle and sparing procedure maintaining the natural shape of the eye ensuring fast corneal recovery.

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