Chengdu public hospital will popularize femtosecond laser treatment of myopia

Chengdu Hospital Authority identified 2012 as the “capacity-building year” of Chengdu Public Hospital, requiring rapid improvement of medical technology level. Recently, the femtosecond laser for the treatment of myopia in the ophthalmology department of Chengdu Third Hospital ushered in the first patient. This high-tech equipment costing 10 million yuan minimizes the risk of myopia surgery, and the patient can easily remove the glasses. . It is reported that this is the first high-tech equipment for the treatment of myopia in public hospitals in Chengdu. In order to make this technology popular in the province as soon as possible, the Chengdu Third Hospital specializes in organizing doctors in the ophthalmology department of the province and has organized a training course on femtosecond technology continuing education. .

What is a femtosecond laser? Chengdu University of Medicine specializes in teaching Professor Shi Dianxiong of the University of Wayne University in Michigan, USA, telling reporters that femtosecond is the unit of measurement of time, 1 femtosecond is equal to 1/1000 trillion seconds, and femtosecond laser is the shortest pulse type of infrared light. It has a very high instantaneous power and can focus on ultra-fine spatial areas smaller than the diameter of the hair. Because of this, femtosecond lasers are used in ophthalmic surgery, allowing doctors to accurately focus and position the patient's eyes in ultra-fine spaces to quickly correct myopia.

Traditional myopia surgery requires a doctor to cut the patient's corneal flap with an ultra-thin blade, turn it over, and correct the refraction. "It has a higher risk. On the one hand, the surgical lamellar knife cannot do it. The accuracy of the depth of the cut, on the other hand, the blade is prone to accidents during the rotation process, making the flap flap completely fail.” The femtosecond laser ends the risk of traditional surgery. Shi Dianxiong said that just like the precise point blasting used in the demolition now, the femtosecond laser uses a "light blasting" technique to locate several "blasting points" on the corneal flap, which makes the corneal flap produce gas, which is easy. When the flap is opened, the doctor can perform the operation smoothly. "The patient is positioned by the computer during the operation. The laser femtosecond makes this position very accurate. How many points to "blast"? How many points, how deep, how deep. You think, the thin layer of the cornea can be so accurate, it is very difficult, this is the advantage of femtosecond laser."

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