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Changes of corneal higher order aberration analyzed by continuous measurement after phacoemusification

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Session Details

Session Title: Cataract Surgery Equipment. Cataract Surgery Outcomes

Session Date/Time: Monday 07/09/2015 | 16:30-18:30

Paper Time: 17:28

Venue: Main Auditorium

First Author: : S.Choi SOUTH KOREA

Co Author(s): :    H. Lim   J. Lee                 

Abstract Details


To analyze the changes of corneal higher order aberration (HOA) measured serially by KR-1WⓇ wavefront analyzer at every second for 10 seconds before and after phacoemulsification, and to evaluate the relationships of HOA with the ocular surface indicators (Schirmer test, tear break-up time, fluorescein corneal staining).


Department of Ophthalmology, Chungnam National University School of Medicine, Daejeon, South Korea


Corneal HOA was measured in 47 eyes of 30 patients pre- and post-operatively at 2, 4, 6, and 8 weeks by KR-1W every second for 10 seconds using the continuous measurement mode. The patients were divided into 2 groups according to their Schirmer test (above 10 mm or less than 10 mm), tear break-up time (above 5 seconds or less than 5 seconds), and fluorescein corneal staining (above grade 1 or grade 0) for analyses of relationships between HOA with the ocular surface indicators.


Short-term follow up after phacoemulsification revealed that corneal HOA rapidly increased at 2 weeks and recovered to the preoperative level at 8 weeks after the surgery. Corneal HOA values fluctuated during 10 seconds and serial changes of corneal HOA were not significant at 2, 4, 6 weeks after surgery. However, corneal HOA during 10 seconds showed increasing tendency depending on time at preop and 8 weeks, and serial changes were statistically significant (preop: p<0.001, 8 weeks: p=0.027). There were no significant differences of HOA between the 2 groups divided according to their each ocular surface indicator.


The HOA of the cornea was restored to its preoperative values at 8 weeks after phacoemulsification. Preoperative three ocular surface indicators did not significantly influenced on postoperative corneal HOA. The factors related to surgery are more significant in postoperative corneal HOA than preoperative ocular surface indicators.

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