ABSTRACT
INTRODUCTION: BACKGROUND Nowadays, several methods of surgery may be applied to treat myopia. These methods may be combined to achieve the surgical goal. While photorefractive keratectomy (PRK), laser assisted in situ keratomileusis (LASIK) and intracorneal rings (ICR), may be used to treat low myopia, LASIK is the method of choice for up to 10 diopters. Higher levels of myopia may require phakic intraocular lenses (IOLs) or even clear lens extraction. However, treatment of the most common cause of ammetropia, presbyopia, is still under investigation. Several techniques have been assessed including presbyopic LASIK, intracorneal inlays, clear lens extraction followed by multifocal IOL implantation, scleral rings and recently phakic presbyopic IOLs. Among these techniques, additive surgeries benefit adjustibility, adaptibility, and reversibility. This is why we have been investigating the design of phakic multifocal IOLs for the past 18 months.
