1, first of all, it is important to understand that femtosecond laser is only the production of a corneal flap, lift the corneal flap after the excimer laser to remove myopia, to complete the femtosecond LASIK surgery. Femtosecond laser is not a substitute for excimer laser superficial corneal surgery. 2, femtosecond LASIK surgery still post-operative vision loss will occur. Once the vision loss, it is impossible to talk about the improvement of visual quality. 3, no matter what kind of surgery to correct myopia, post-operative to reduce the time of near eye use to a minimum, long-term look at the phone, tablet, TV, reading, but also cause vision loss, myopia development. 4, currently the only non-invasive control of myopia development is an effective method of outdoor activities.