Purpose: The aim of this study was to make an evaluation of the pseudoaccommodation span and clinical results after implantation of a diffractive, apodised and trifocal multifocal intraocular lens (MIOL).
Methods: In a prospective, single-centre study 28 eyes of 14 patients were evaluated after in the bag implantation of the Micro-F MIOL (PhysIOL, Belgium) during routine microsurgical cataract surgery. Two to four months postoperatively the final examinations were performed. Refraction, visual acuity monocular and binocular (near in 40 cm, intermediate in 80 cm and distance) as well as binocular defocus curves were evaluated.
Results: Mean monocular UDVA (uncorrected distance visual acuity) increased significantly (p < 0.0001) from 0.471 ± 0.22 logMAR to 0.144 ± 0.14 logMAR. For the monocular UNVA (uncorrected near visual acuity) and UIVA (uncorrected intermediate visual acuity) postoperative values of 0.127 ± 0.117 and 0.158 ± 0.20 logMAR compared to binocular results of 0.057 ± 0.137 and 0.094 ± 0.181 logMAR were found. In the analysis of the binocular defocus curve two peaks could be found between 0.0 and - 0.5 D with a visual acuity of 0.0 logMAR and at - 3.0 D with a visual acuity of 0.068 logMAR. In the intermediate range a constant pseudoaccommodation of 0.2 logMAR could be found.
Conclusions: The trifocal, diffractive MIOL shows good functional results in all distances with a span of pseudoaccommodation of 3D and a mean visual acuity of 0.2 logMAR and better. Indeed it is offering a high level of spectacle independency without the typical intermediate gap of bifocal diffractive MIOLs.
Georg Thieme Verlag KG Stuttgart · New York.