Journal of Cataract and Refractive Surgery, volume 51, issue 3, pages 196-203

Assessing Postoperative Toric Intraocular Lens Rotation: A Comparative Analysis

Marcus Lisy 1
, 
Victor Danzinger 1
, 
Markus Schranz 1
, 
Nikolaus Mahnert 1
, 
Claudette Abela-Formanek 1
, 
Christina Leydolt 1
, 
Rupert Menapace 1
, 
Daniel Schartmüller 1
1
 
Publication type: Journal Article
Publication date: 2025-03-01
scimago Q1
SJR: 1.472
CiteScore: 5.6
Impact factor: 2.6
ISSN: 08863350, 18734502
Abstract
Purpose:

To investigate the accuracy of three distinct postoperative toric intraocular lens (TIOL) rotational stability measurement methods.

Setting:

Department of Ophthalmology and Optometry, Medical University of Vienna, Austria.

Design:

Single-center, prospective, interventional clinical trial.

Methods:

128 eyes of 81 patients with age-related cataract received a hydrophobic acrylic TIOL Clareon CNW0T3-9. To evaluate rotational stability, three distinct assessment methods were used: (Rotix) comparing the TIOL axis at the end of surgery (EoS) to 1 week (1w) and 6 months (6m) postoperatively using reference vessels at the sclera, (Slit-lamp) comparing the intended axis (IA) with the axis at 1w and 6m using slit-lamp photography using the horizontal axis as a reference and (Casia) comparing the IA with the axis at 1w and 6m using the axis determination tool of a swept-source anterior segment optical coherence tomographer (Casia 2).

Results:

Mean absolute rotation from EoS/IA to 6m differed significantly among Rotix (1.33± 1.99° [0.01;19.80]), Casia (2.88± 2.64° [0.00; 19.00]), and Slit-lamp (4.38± 3.38° [0.02;19.38]), as indicated by Friedman's test (X2=71.852, p<0.001). Bland-Altman coefficients (CoR) of repeatability indicated the closest agreement of results between Casia and Rotix, with a CoR of ±3.95°, followed by Slit-lamp and Casia (±6.82°), and lastly, between the Slit-lamp and Rotix (±7.19°).

Conclusion:

When assessing true TIOL rotational stability, it is imperative to use fixed anatomical landmarks as reference and establish a baseline at the end of surgery. When assessing TIOL rotation along the horizontal axis, considering cyclorotation of the eye is crucial and must not be underestimated.

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