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Comparative imaging study of premium multifocal diffractive IOLs

Poster Details

First Author: C.Choi SOUTH KOREA

Co Author(s):    G. Auffarth   H. Son   R. Khoramnia   T. Tandogan           

Abstract Details


To analyze the surface quality of different types of diffractive IOLs.


Department of Ophthalmology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea


Five different types of multifocal IOLs (AcrySof® IQ PanOptix™, Tecnis Symfony®, AT LISA tri 839MP, MINI WELL®(SIFI Meditech), FineVision® Trifocal (PhysIOL)) were evaluated. Each IOL was first examined using scanning electron microscope (SEM, Inspect F, 5.0KV, maximum magnification up to 20,000) and atomic force microscope (AFM, Park Systems, XE-100, Non-contact, Linear and area profile comparison, 10x10µm, 30x30µm). Then, three different representative parts (anterior & posterior central optic and diffractive areas) of each IOL was analyzed and compared morphologically and quantitatively using RMS Roughness (Rq) and Roughness Average (Ra) values.


In SEM analysis, all IOLs showed smooth optical surface without any irregularities. In the diffractive optic area, the Tecnis Symfony® IOL showed unique, highly regular, concentric, and circular structures (2~3 micron scales, in 20,000 SEM image), which could not be seen in other studied diffractive IOLs. AFM images of each IOL showed different topographical natures such as ridges, pores, and irregularities in 3 different parts of optic surfaces, but the quantitative Roughness Average (Ra) values of all IOLs did not exceed 10nm.


Topographical surface irregularities of diffractive multifocal IOLs could affect the optical quality of patients. In AFM, the Ra (nm) values of the all the studied IOLs were within an acceptable range (<10nm, Ra). In comparison to other hydrophobic diffractive IOLs, the Tecnis Symfony IOL showed higher Ra (nm) values, but it demonstrated the most regular concentric pattern in morphological imaging of diffractive surfaces.

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