Corneal surgery mainly involves replacing the cornea or cutting the cornea to change the corneal curvature to treat ocular surface related diseases or to correct refractive errors, and mainly includes corneal transplantation and keratoconus surgery. Corneal transplantation is performed through preoperative eye examination, application of pupil dilators, hypotensive drugs, etc., selection of corneal donors to make corneal grafts, incision after anesthesia to make implant beds, and suturing of the grafts to the cornea to complete the surgery, which is mostly used for severe keratoconus diseases such as keratitis, keratoconus, and high refractive errors. Keratoconus refers to laser corneal surgery, in which a small amount of superficial corneal tissue is cut to change the surface curvature of the cornea, thereby altering the refractive power of the cornea and correcting the refractive error. It is recommended that patients with keratoconus be seen promptly for evaluation and treatment as prescribed.