Corneal cross-linking is a commonly used surgical procedure for the treatment of conical cornea, the main side effects and hazards are as follows: first, there will be obvious pain after surgery, corneal cross-linking surgery process will scrape the corneal epithelium, thus causing obvious eye pain in the early postoperative period, especially within three days, but with the repair of the corneal epithelium, the pain will gradually disappear; second, eye infection, in the early postoperative period Third, the recurrence of viral keratitis, corneal cross-linking surgery may activate the virus latent in the corneal nerve fibers, thus causing the recurrence of viral keratitis, so patients with viral keratitis are prohibited from doing corneal cross-linking; fourth, causing dry eye, the health of the corneal epithelium will be affected after corneal cross-linking surgery, which will lead to dry eyes in the short term. This may cause dryness in the eyes in the short term, but it usually recovers in about three months.