The analysis of surgically-induced astigmatism on total cornea after micro-coaxial cataract surgery

Session Details

Session Title: Paediatric Ophthalmology & Other Topics

Session Date/Time: Tuesday 25/09/2018 | 08:00-10:30

Paper Time: 09:18

Venue: Room A3, Podium 2

First Author: : J.Kim SOUTH KOREA

Co Author(s): :    W. Whang   H. Kim                 

Abstract Details

Purpose:

To analyze surgically-induced astigmatism (SIA) on the anterior cornea and on the cornea as a whole determined using an automated keratometer and a Scheimpflug rotating camera with SIAs calculated using various keratometric measurements.

Setting:

Yeouido St. Mary hospital, Seoul, South Korea

Methods:

The study included 75 left eyes of 75 patients who had undergone cataract surgery between July and October 2017. Following phacoemulsification, the intraocular lens was inserted into the bag through a 2.2-mm micro coaxial incision. Refractive outcomes and keratometric measurements were measured 6 months post-operatively, using a Canon RK-5 automated refractor and a Pentacam rotating Scheimpflug camera. SIA was analyzed using the vector method and an aggregate analysis of astigmatism based on the vector method.

Results:

The SIAs determined by automated keratometry and Pentacam anterior K were 0.38 and 0.42 diopter, respectively, while the SIA on the posterior cornea was 0.13 diopter. The SIA determined using the TCRP 2.0-mm ring was the greatest (0.62 diopter), followed by the SIA determined according to EKR 3.0-mm, TCRP 3.0-mm zone, EKR 4.5-mm, and TCRP 4.0-mm zone. The SIA on the total cornea was significantly greater than the SIA on the anterior cornea (all p < 0.05), with differences ranging from 0.04 to 0.22 diopter.

Conclusions:

SIA on the cornea as a whole was significantly greater than SIA of the anterior cornea and SIA on central area was grater than SIA on peripheral area.

Financial Disclosure:

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