Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


escrs app advert yo advert


Search Title by author or title

What can you expect from intraoperative aberrometry on pseudophakic eyes?

Poster Details

First Author: A. Cantagalli ITALY

Co Author(s):                        

Abstract Details


To investigate the abilities of intra-operative aberrometry as a final refraction check in cataract surgery.


Private Hospital, GSD Villa Erbosa, Bologna, Italy


In this study, the pseudo-phakic refraction of 50 eyes is measured using the intra-operative aberrometer I-O-W-A (Eyesight & Vision, Germany). The intra-operative refraction is compared with the refraction in follow-up examinations (Tracey Technologies). A special situation arises when the IOL doesn't unfold its final refraction within the first minutes after implantation. To investigate the influence of the unfolding state on the intra-operative refraction, I-O-W-A measures the refraction twice: the first sampling point is directly after implantation of the IOL, the second one a few minutes later.


For 50 eyes, the wavefront measured with I-O-W-A is compared with results of follow-up examinations. A preliminary dataset of 17 eyes yields a mean difference of 0.19 D (standard deviation: 0.36 D). The effect of a slowly unfolding IOL is investigated in form of a case study. It is found that folding the IOL in the injector may cause a significant cylinder which is seen directly after implantation. The induced cylinder decreases within a few minutes and vanishes until the follow-up examination. Furthermore, the induced cylinder affects only weakly the intra-operative spherical equivalent.


Intra-operative aberrometry on pseudo-phakic eyes is a helpful tool for final refraction checks in cataract surgery. However, when implanting slowly unfolding IOLs, there might be a significant cylinder directly after implantation. There are two ways to deal with such a situation: Either restricting yourself to the spherical equivalent, or waiting a few minutes until the IOL has sufficiently unfolded, such that the IOL's refraction is close to its final value.

Financial Disclosure:


Back to Poster listing