Assessment of IOL edges using scanning electron microscopy and atomic force microscopy: Clareon IOL vs AcrySof SN60WF IOL

Session Details

Session Title: Presented Poster Session: Cataract Surgery Special Cases

Venue: Poster Village: Pod 1

First Author: : L.Mastropasqua ITALY

Co Author(s): :    P. Mattei   L. Vecchiarino   E. D'ugo   E. Doronzo   G. Falconio   L. Toto        

Abstract Details

Purpose:

To compare the edges of two single-piece aspheric monofocal intraocular lenses (IOLs), the AcrySof SN60WF IOL (Alcon Laboratories Inc.) and the Clareon IOL (Alcon Laboratories Inc.) using Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) to assess edge regularity.

Setting:

Ophthalmology Clinic, University "g. d'Annunzio" of Chieti-Pescara, Italy

Methods:

The AcrySof SN60WF IOL is composed of hydrophobic acrylic material and the Clareon IOL of a novel optic polymer material. Scanning electron microscopy images and AFM images of the edges of ten IOLs of each type were acquired. Irregularities of the edges were visually inspected on SEM images. Roughness analysis (RA) was assessed using AFM on a 3 μm scan size of the edge of both IOLs.

Results:

At SEM the edges of the Clareon IOL were regular and smooth; on the contrary the AcrySof IOL presented one of the two edges with a thin irregular film of material. At AFM the Clareon edges showed a regular pattern of ridges perpendicular to the anterior and posterior IOL optic while the AcrySof edges showed irregular dimpling. Roughness analysis at AFM was 4.105±0.806  nm in AcrySof IOL and 1.565±0.483  nm in Clareon IOLs (p<0.05).

Conclusions:

The regular perpendicular ridges of the edge of Clareon lenses may have an effect of limiting rotation when implanted.

Financial Disclosure:

None