Considerations on the calculation of multifocal duet implantation in a monovision scenario for the correction of presbyopia – a case example

We report a case in which the patient wanted a reversible multifocal lens implantation due to dysphotopsia considerations, with the additional wish to still be spectacle independent in case of revision. We decided to implant a monovision with monofocal intraocular lenses in the capsular bag and multifocal additive sulcus lenses to convert the monovision into an emmetropic target refraction on both eyes. The aim of this case report is, besides describing the casuistry, a detailed description of our thoughts and procedure for calculating the additive sulcus lens in this case of duet implantation and the resulting still unknown later postoperative anterior chamber depth and postoperative subjective refraction.