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Comparison of surgically-induced astigmatism between exchange and reposition technique in dislocated intraocular lens

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Session Details

Session Title: Cataract Surgery Complications. IOL Dislocations

Session Date/Time: Monday 07/09/2015 | 17:00-18:30

Paper Time: 17:38

Venue: Room 10

First Author: : H.Kim SOUTH KOREA

Co Author(s): :    K. Kang   S. Eum                 

Abstract Details


To compare the surgically induced astigmatisms and postoperative outcomes in patients with dislocated intraocular lens (IOL) who had undergone IOL repositioning with conventional IOL exchange technique.


Reterospective, case control study at a tertiary referral center. Kyungpook National University Hospital/ Tertiary Hospital, Korea


From June 2009 to December 2013, 14 eyes of 14 patients (10 males and 4 females) who had undergone IOL exchange were identified retrospectively as group 1 and 15 eyes of 15 patients (15 male) who had undergone IOL repositioning were evaluated as group 2. Surgically induced astigmatism was defined as the difference between preoperative and postoperative astigmatism. Cylinder power of surgically induced astigmatism, best corrected visual acuity, endothelial cell count, intraocular pressure and spherical equivalent were analyzed preoperatively and at 3 months after surgery.


Larger cylinder power of induced astigmatism was found in group 1 than in group 2 at 3 months after surgery (1.30 ± 0.45 diopters vs. 0.76 ± 0.43 diopters; t-test, p=0.003). No significant difference in postoperative best corrected visual acuity (logMAR) was found between group 1 and group 2 (0.09 ± 0.14 vs. 0.21 ± 0.21; t-test, p=0.075). Postoperative intraocular pressure was similar between the patients who underwent IOL exchange and the patients who underwent IOL repositioning (16.2 ± 3.3 vs. 14.5 ± 3.0; t-test, p=0.16). Difference in endothelial cell count (-123.5 ± 234.05 vs. 43.80 ± 106.13; t-test) and spherical equivalent (1.35 ± 3.18 vs. 2.28 ± 3.67; t-test, p=0.21) were also similar with no significant difference.


IOL repositioning technique was evaluated as more effective dislocated IOL correcting surgery method than IOL exchange technique with showing lower surgically induced astigmatism. However, final results in best corrected visual acuity, postoperative intraocular pressure, difference in endothelial cell count and spherical equivalent showed no significant difference.

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