Intraocular correction of presbyopia after laser keratorefractive surgery

Abstract

Purpose. To present the results of research on modern aspects of intraocular correction of presbyopia after laser keratorefractive surgery. Material and methods. A literature search was performed to identify studies on databases eLibrary, PubMed and Scopus, using the keywords «calculation of multifocal lenses», «multifocal IOLs after refractive surgery», «correction of presbyopia after refractive surgery» (in the eLibrary database), «multifocal IOL» and «multifocal lenses calculation» (in the PubMed and Scopus databases). Thirty related articles were identified. In addition, seven clinical studies in which different groups of patients with a history of refractive surgery underwent correction of presbyopia with multifocal intraocular lenses (IOL) were identified. Results. In this article, there are examples of recent research of information about the intricacies of calculating refractive power of multifocal lenses after refractive surgery. Every year the number of people with a history of laser vision correction is growing, which means that for surgeons arises question about correct calculation of keratometric parameters. To date, the calculation of the value of the optical power of an implantable multifocal IOL after laser refractive surgery is complex and individual for each patient. Most people in this category are still not ready to wear glasses. Recent studies confirm the success of calculating implantable multifocal IOL, and ways to minimize inaccuracies in hitting the refraction of the target lie both in the approach to calculating the optical power of an implanted multifocal lens, and in choosing the optimal method for assessing artificially modified cornea keratometry. Conclusion. The results of clinical studies presented in the review allow us to conclude that the results of calculating the optical power of implanted multifocal IOLs are quite successful and, in turn, clinical and functional results in patients with a history of laser refractive surgery. However, further research is required. Key words: presbyopia correction, multifocal IOL, IOL calculation formulas, laser correction, LASIK, FemtoLASIK, SMILE.