Which is better for treating myopia, Weishi or Bausch & Lomb's machine laser?

VISX STAR S4 excimer laser correction system in the United States is the most advanced laser correction system in the world today. The system has the following six advantages: 1. It adopts super intelligent variable spot flying spot scanning technology and personalized treatment scheme; 2. Patented technology of infrared-guided 3D eyeball automatic tracking and positioning; 3. Individualized wavefront aberration correction technology of "eye fingerprint"; 4, 8mm surgical treatment area, effectively prevent postoperative glare; 5, laser system intelligent case card, to avoid surgical dislocation, to ensure the safety of surgery; 6. Seven-beam array scanning technology can cut the cornea stably and smoothly. Excimer laser surgery must pass detailed and rigorous preoperative examination, mainly (1) the age is 18-55 years old, myopia is 1-15 degrees, hyperopia is within 8 degrees, and astigmatism is within 6 degrees; (2) The operation must be performed due to an eye disease, and there is no fundus lesion; (3) The diopter has been stable in recent two years, and its development speed is not more than .5 d per year; (4) After a perfect examination before excimer laser surgery, the person who can perform the operation is determined.