Myopia eight hundred degrees astigmatism 175 degrees can do half-femtosecond laser surgery, according to the preoperative corneal thickness and other checks to determine that the conditions meet the half-femtosecond surgery is possible. Because of the semi-femtosecond laser surgery on the cornea thickness corneal endothelial cells have certain requirements, and the higher the degree of these requirements are also higher, for eight hundred degrees of high myopia exists 175 degrees of astigmatism, the above conditions meet the semi-femtosecond surgery can be carried out, if the cornea is too thin, the postoperative conical cornea and other conditions may occur. However, for this kind of high myopia of over 800 degrees, the corneal thickness may not reach the requirement of semi-femtosecond laser surgery in general. After perfecting the endothelial cell preoperative examination, you can choose ICL IOL implantation and other types of surgeries with lower requirements on the cornea, which can better avoid the occurrence of cornea-related postoperative complications. It is recommended that the specific choice of myopia correction surgery should be made after perfect optometry, corneal thickness and other auxiliary examinations, under the guidance of the doctor’s advice to make a reasonable choice.