What is Microkeratome and why is it used in laser eye surgery?
If he looked at laser eye surgery (Lasik), he probably already heard about a device called a microkeratory. Wondering what exactly the microkeratom means and what role does Lasik play? These are excellent questions and many people never fully understand the answers.
To fully understand, it is useful to look back at the early development of laser ophthalmic surgery. Initially, these operations were called PRK (photorefractic keratectomy) and did not participate in the microkeratom. An excimer laser was used to directly treat and transform the corneal surface to alter eye optics.
Optically PRK is quite effective but has significant drawbacks. When PRK is implemented, there is a large bare covered area at the front of the cornea, which is like a huge scratch on your eyes. If you've ever had a scratch on the cornea, you know that it can be painful and it can take time for healing.
Generally, the PRK lasts for about 3 days until the epithelium of the outer surface of the cornea closes, and after a short time, the swilling and healing are stabilized. Typically, the binding lens is placed on the eye for 3 days to protect and enhance comfort.
Lasiko was designed to combine PRK with an older technology, the microchip, from another ophthalmic surgery called ALK. The combination of these techniques aims to reduce recovery time and increase comfort compared to PRK.
The microkeratom can cut a thin layer of tissue from the cornea surface. This layer can be hinged and carefully raised and folded out of the way. Imagine being like a wall calendar where the previous month can be reverted to display the next page. Once this weft is removed, the excimer laser can optically manipulate and transform the underlying cornea. Once completed, the wing can be replaced with the treated cornea.
The lid is placed in place of the PRK bandage contact lens and acts as a natural tissue binding if desired. It allows the cornea to remain virtually intact and has no large scratches on the surface. Vision returns quickly, and patients often see 20/20 the next day. Pain is usually minimal and limited to early hours after the start of the procedure. First, this wing is delicate, and patients are not recommended to rub their eyes in the first few days after Lasik, but they will heal over time and close to prevent patients from working.
The early microkeratoms actually used physical razor blades and high-speed oscillating mechanisms. In recent years, there has been no need for blades or moving gears. A special laser, called the femtosecond laser, can create a cover with much greater accuracy and accuracy than older devices.
These laser microkeratoms also have much smaller problems with wings, such as freely cut wings, apertures on openings, or drawn metal fragments / oils favor the wings. Because of their design, the surgeon has much better control because he can actually see the lid that he has created, and even change the size and shape of the computer screen to fit the individual's eyes.
In summary, the use of the microkeratory in laser eye surgery has greatly influenced the procedure, which allows for greater convenience and faster healing of patients compared to PRK. The development of the femtosecond laser microkeratome provides greater security and incredible precision control that allows us the flexibility to customize the Lasik wings in a way that was inconceivable.
- Published On : 4 months ago on March 25, 2019
- Author By : 346@dmin
- Last Updated : March 25, 2019 @ 11:48 am
- In The Categories Of : Uncategorized