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Anterior chamber anatomy influences anterior chamber depth and angle alterations following phacoemulsification

Session Details

Session Title: Cataract II

Session Date/Time: Saturday 16/02/2013 | 08:30-11:00

Paper Time: 08:48

Venue: Hall 1

First Author: : T.┼╗arnowski POLAND

Co Author(s): :    K. Barchan Kucia   M. Rekas           

Abstract Details

"Purpose:

The aim of the study was to compare selected parameters of the anterior chamber (AC), i.e. AC depth (ACD) and anterior chamber angle (ACA) following uneventful phacoemulsification with several types of IOL.

Setting:

Department of Ophthalmology, Medical University, Lublin, Poland Department of Ophthalmology, Military Institute of Medicine, Warsaw, Poland

Methods:

162 eyes of 162 patients undergoing uneventful phacoemulsification were included into the study. Patients were randomized to receive one of the following 1-piece acrylic IOLs: 35 AcrySof Natural IQ (Alcon, USA), 31 AcrySof SA60AT (Alcon, USA), 29 Akreos (Bausch&Lomb, USA), 32 Aspira-aA (Human Optics, Germany) and 35 Superflex (Rayner, UK). ACD and ACA, AXL and lens thickness before the surgery and ACD and ACA 3 months after the operation were measured. For the description of the anatomical alterations in the AC we proposed the factor, which is the relationship of the ACD before the operation to the sum of ACD and lens thickness multiplied by AXL. There were no epidemiological differences between the groups with regard to age, gender, AXL, chamber depth (ACD), chamber angle (ACA) and IOL power, spherical equivalent, best corrected visual acuity (BCVA) and crystalline lens thickness.

Results:

We noted the inverse correlation between the factor describing anatomical relationship in the anterior chamber before the surgery and alterations of the ACD (R=-0.74, P<0.05) and alteration of the ACA (R=-0.17, P=0.01) occuring after surgery. Coefficient for the model of multivariate regression: R2=0.60 confirms the validity of the model. We determined that position of the IOL in the eye is the same as predicted by manufacturer (A value). We found that there are significant differences between the position of studied IOLs (P=0.027). Post hoc analysis (NIR test) proved that Aspira-aA IOL lies significantly deeper in comparison to the other types of IOLs (P<0.05).

Conclusions:

Characteristics of the anterior chamber anatomy before the surgery influences anterior chamber depth and angle alterations following phacoemulsification. Various types of IOL behave differentially with respect to their position in the AC. Aspira-aA IOL lies deeper than other types of IOLs.

Financial Disclosure:

None"

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