As a well-established and dominant technology among many keratomileusis procedures, the safety and reliability of LASIK is undisputed. However, this does not mean that LASIK is free of risks (i.e., complications). Possible complications of LASIK include: infection, undercorrection or overcorrection, corneal penetration, medically induced corneal astigmatism, secondary cone corneas, corneal flap irregularities, flap freeing, epithelial implantation, glare, etc. Most of these complications, if detected and managed properly, do not leave a residual effect. Most of these complications, if detected and managed properly, will not leave sequelae and will not affect the outcome. However, some complications do prevent vision recovery, such as preoperative myopia, postoperative overcorrection into high hyperopia; or preoperative astigmatism, postoperative high astigmatism, etc. If the corneas left by the patients after surgery are too thin, it is not possible to remedy the problem by reoperation. For example, if the cornea penetrates during surgery or if severe cone corneas develop after surgery, the patient may have to undergo corneal transplantation, which may cause new problems and troubles to the patient and result in adverse consequences. As we all know, most of the patients who undergo LASIK surgery are young and middle-aged people over the age of 18, who are at an important stage of their life with a promising future. If serious complications occur and affect the patient’s vision, it will cause new or even greater pain to the patient, so both doctors and patients should be fully aware of the possible risks of LASIK and choose and perform the surgery carefully. In addition to the complications mentioned above, the disadvantages of LASIK such as decreased corrected visual acuity, night glare, decreased quality of vision, and decreased night vision are also more common. Foreign data show that as many as 30% of patients have difficulty driving at night after LASIK! It has been proven that just the safety of surgery and just the improvement of naked eye vision can no longer meet the visual requirements of modern patients with refractive errors.