The advent of intraocular lens implantation (ICL) with the preservation of the clear crystalline lens has been a welcome development for patients with high and very high myopia. So what are the advantages and disadvantages of this type of IOL implantation? Disadvantages of IOL implantation for high myopia: 1. Certain age requirements for patients; 2. High requirements for the operated eye; 3. Because it is an internal eye surgery, some related complications such as infection, postoperative high intraocular pressure and corneal endothelial damage may occur. Advantages of IOL implantation for high myopia: 1, good predictability, increased field of vision; 2, good reversibility; 3, ideal refractive correction, wide range of correction; 4, retains the natural adjusting function of the lens, postoperative distance, intermediate, and near vision and visual quality can be improved; 5, fast visual acuity restoration; 6, refractive stability, no regression; 7, no need to remove the crystalline lens, to ensure the integrity of the physiological structure of the eye; 8. The eye is not required to remove the crystalline lens, which ensures the integrity of the eye’s physiological structure.