Cataract surgery is the most common surgery in ophthalmology. The aim of cataract surgery is to restore vision in eyes in which the natural lens became opacified mostly due to the aging of the lens, or the presence of other ocular diseases, which promote earlier cataract formation. During cataract surgery, artificial intraocular lens (IOL) is implanted into the lens capsule and the value of the IOL is planned before surgery based on the preoperative IOL calculation. However, in the significant number of patients, cataract surgery may end up with a postoperative refractive error in which case patients have to wear glasses to reach the full vision for both distance and near correction (if monofocal IOL is used during cataract surgery!). Modern cataract surgery becomes more and more a refractive procedure as well, especially when multifocal and/or toric IOLs are implanted. However, in some specific cases where such IOLs are not applicable, high postoperative refractive error after cataract surgery can significantly influence the quality of the obtained vision. One such example is cataract surgery after penetrating keratoplasty. In this chapter, results of a novel approach of post-PK ametropia correction, namely implantation of sulcus placed AddOn IOLs (also called a piggyback lens) will be presented.
Part of the book: Refractive Surgery
Small-incision lenticule extraction (SMILE) is becoming the procedure of choice in treating myopia and myopic astigmatism. With great comparability in terms of visual outcome with the femtosecond laser-assisted in situ keratomileusis (FsLASIK) procedure, the method is characterized by better patient satisfaction and less postoperative dry eye induction. Moreover, it has the advantages of better eye surface stability and biomechanical strength compared to FS-LASIK. The method is now globally accepted among refractive surgeons. Patients suitable for the procedure must meet criteria for keratorefractive procedures generally. Our current clinical experience suggests that the lenticule extraction procedure delivers promising refractive results in terms of predictability, efficacy, and safety.
Part of the book: Refractive Surgery