Posters

Intraoperative aberrometry vs optical biometry for intraocular lens calculation in cataract surgery

Poster Details

First Author: B.Garcia SPAIN

Co Author(s):    A. Miquel López   M. Alarcón Tomás   P. Suárez Bento   E. Gijón Vega   R. Martínez Díaz   J. Bermúdez Pío-Rendón     

Abstract Details

Purpose:

To analyse if intraoperative ORA aberrometer system, as a calculation method of the intraocular lens power implanted in cataract surgery, is closer to post-operative emmetropia than the standard calculation procedure with IOL Master® biometer, Haigis and SRK/T formulae.

Setting:

Retrospective analysis of 159 eyes of 115 patients who underwent uneventful phacoemulsification surgery with IOL implant performed by the same surgeon between April 2016 and February 2017 in La Vega Hospital, Oftalvist Group, Murcia.

Methods:

Patients were divided in two groups. In group I (n=78) IOL power was calculated preoperatively with IOL Master® using the Haigis and SRK/T formulae; on the other hand, IOL power of Group II patients (n=81) was calculated with IOL Master® as well as intraoperatively using ORA aberrometer system. Refractions in both groups were reviewed thirty days after surgery in order to compare the difference between the estimation with each predictive method and the actual refractive post-surgery error. Keratometry, anterior chamber depth and axial length were measured to evaluate if they have any influence in the refractive outcome.

Results:

The mean refractive error was significantly favourable to the ORA aberrometry group (Group II) (p=0,0001), with a bigger percentage of spherical equivalent  < ± 0.5 diopters, although no significant values were found. Refractive outcomes between Haigis, SRK / T formulae and ORA® aberrometer system after stratifying eyes according to their morphological features was favourable to ORA group in all types of eyes, with no significant values.

Conclusions:

Intraoperative ORA aberrometer system is more accurate at calculating IOL power in cataract surgery with closer to emmetropia post-operative results than calculations using standard biometry IOL Master® with Haigis and SRK/T formulae.

Financial Disclosure:

None