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Статьи о здоровье Игры для проверки зрения

Intra-LASIK – an All Laser LASIK

Intra LasikIntra-LASIK (Femto-LASIK) is a modification of the most popular today LASIK procedure. The first clinical use of Intra-LASIK Excimer laser correction was in 2003. The core idea of Intra-LASIK is the creation of corneal flap by a Femto-second laser rather than a mechanical microkeratome with a steel blade used in traditional LASIK. This technique is also called as All Laser LASIK.

Creation of corneal flap by a Femto-second laser procedure:

  • The Femto-second laser creates a corneal flap by exposure of tissue to very fast bursts of laser beam. With standard LASIK the flap is created using a metal blade – microkeratome.
  • Passing through corneal surface layers the laser beam pulses focus at a preset depth creating a bubble in the prescribed by the ophthalmosurgeon point of corneal stroma. .
  • Then the Femto-second laser sends pulses to adjacent corneal areas and consequently the bubbles merge creating a uniform layer of bubbles under the corneal surface. Thus a corneal flap is “delaminated” from inside.
  • The only thing left is for the ophthalmic surgeon to separate the tissue alongside the created plane.

In 1999 Ahmed Zewail received the Noble Prize for the research in Femto-laser use. The major advantage of the Femto-second laser is very precise modeling of the corneal flap. This laser allows to create a thinnest corneal flap fully controlling it’s thickness, alignment and morphology with minimum architectural damage. The wide-scale use of the Intra-LASIK procedure has been started rather recently but has already been proven as troubleproof and effective procedure.

Intra-LASIK ensures a perfect cut surface with no physical contact with the eye which adds to the good vision quality as the outcome of the surgery.

Procedures of Intra-LASIK Excimer-laser vision correction:

  • Anaesthetic eye drops are applied (no general anaesthesia or sedation is used). When anaesthesia took effect the doctor uses an eye speculum to prevent unintentional eyelids blinking;
  • Instead of using a microkeratome with a blade, the ophthalmosurgeon employing the Femto-second laser creates a corneal surface flap which is bent aside giving way for the laser beam to treat deeper corneal layers;
  • Laser beam evaporates corneal tissue shaping a new surface;
  • The epithelial flap is placed back and fixes itself thanks to collagen, the own corneal substance;
  • No suturing is required during Intra-LASIK procedure;
  • When the laser correction is over the eye is rinsed with a special liquid. Then antipyretic drops are used.
  • The same procedure is followed when treating the second eye.

Intra-LASIK advantages

  • Corneal structure integration is intact;
  • No need to cut through cornea when creating the corneal flap;
  • The refractive correction may be used in patients with thin cornea;
  • Majority of patients having undergone the Intra-LASIK procedure got 100% vision.
  • It achieves good vision in low light (twilights, night, rainy or foggy weather);
  • Use of the femto-second laser for the corneal flap creation reduces the risk of keratoconus development after the treatment.
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