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Optical quality with monofocal extended depth of focus IOL

Poster Details

First Author: A.Panico ITALY

Co Author(s):    D. Nguyen   R. Bellucci           

Abstract Details


A new IOL with pericentral negative spherical aberration was designed to provide extended depth of focus and reading ability to implanted eyes. This study was conducted to investigate the aberration results in implanted eyes.


Ophthalmic Unit, Dept of Neurosciences, Hospital and University of Verona, Italy


A series of 20 patients received the new Mini Well IOL (SIFI Medtech, Catania, Italy) at microincision cataract surgery. Inclusion critera were potential visual acuity 0.1 logMAR or better, corneal astigmatism lower than 1 D, and no other ocular disease. Two months after second eye surgery they were examined for visual acuity, ocular aberrations, contrast sensitivity, spectacle use, and photopsias.


At the 2-month visit UDVA was above 0.1 logMAR in every patient. DCNVA (40 cm) was above 0.1 logMAR in 19 patients. Ocular spherical aberration was -0.03±0.02 μ within the central 4 mm, and +0.65±0.17 μ within the central 6 mm. Ocular coma was below 0.5μ at 4 mm O.Z., similar as with aspheric IOLs. Aberration-based optical quality expressed as Strehl ratio was 0.143±0.075. MTF was intermediate between monofocal and diffractive multifocal IOLs. Mild dysphotopsia was reported by 3 patients.


The new Mini Well IOL with pericentral negative spherical aberration provided extended depth of focus to the patients we implanted. The aberration profile with this lens indicates low induction of coma and good optical quality. The special optic design limited dysphotopsia symptoms in this study.

Financial Disclosure:

One or more of the authors research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented

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