Optical Coherence Tomography Angiography Changes Following To Multifocal Lens Implantation

To establish the alterations produced after the implantation of a multifocal intraocular lens in the measurements made with optical coherence tomography angiography (OCT-A).

Hospital Clinico San Carlos

48 eyes diagnosed with bilateral cataract, with distance visual acuity less than 0.5 measured (LogMAR) were included, with refractive defects between +5 and -5 spherical diopters and less than 1 diopter of corneal astigmatism.They underwent phacoemulsification with diffractive multifocal Intensity intraocular lens implantation (Hanita).OCT-A was performed with the Cirrus HD-OCT Angioplex system, before surgery and one month after surgery of the second eye, the parameters collected were inner and outer macular thicknesses, retinal nerve fiber layer thickness and central angiographic parameters.

The mean age of the patients was 70±5.8 years. The prior central thickness of the RFN was 88.74±8.87μm and the after the surgery  94.53±11.32μm . The prior central macular thickness was 258.94±19.51μm and the posterior 267.94±23.04μm. Statistically significant differences were found in all the macular thicknesses studied and in all the RFN measurements except for the superior quadrant. No statistically significant differences were found in angiographic measurements in any of the sectors analyzed.

The implantation of multifocal diffractive IOLs alters the results obtained in the analysis of the macular and optic nerve fiber layer performed with OCT-A without alteration of the angiographic measurements, so their implantation should be taken into account for further study.