The principle of excimer laser surgery is to use a special and extremely precise micro corneal lamellar cutting system (corneal knife for short) to make corneal surface tissue into a round corneal flap with pedicle. After rotating the corneal flap, under the control of the computer, excimer laser accurately vaporizes part of the corneal stroma layer under the flap to be excised, and then washes it under the flap to reset the corneal flap, thus changing the shape of the anterior surface of the cornea, adjusting the refractive power of the cornea, and correcting myopia, hyperopia or astigmatism.
Advantages of excimer laser in treating myopia;
1, which is relatively safe. With the exclusive patented VISX wavefront difference "virtual cornea" function and the unique iris positioning and tracking system, the spot deviation caused by eye movement is avoided, which is more accurate and safe.
2. The operation time is shorter. Generally, excimer correction technology takes more than 50 seconds, while Visx)S4 only takes 30 seconds.
3, save more corneas. Intelligent speckle+flying spot scanning technology can improve the laser cutting speed and save the cornea to a greater extent.
4, the visual effect is better. The combination of large and small light spots corrects the high-order phase difference and completely avoids the night glare after traditional surgery.
Baoding gaoxin ophthalmology hospital