Ultra-fast femtosecond iFS 150: Full-range laser. It only takes 10 second to make the flap, and the corneal flap is embedded within 150 degrees, which is faster and more stable, and its tensile strength is three times that of ordinary ones. Perfect solution to iatrogenic aberration, vision can be restored in a few hours after operation, the treatment range is wider, and the safety is greatly improved on the basis of ordinary femtosecond laser surgery. At the same time, it is the only femtosecond laser technology certified by FDA, CE, SDA and the Ministry of Health and Welfare.