COMPARISON OF TORIC INTRAOCULAR LENS ROTATIONAL STABILITY MEASUREMENT METHODS
Published 2024
- 28th ESCRS Winter Meeting
Reference: P095
| Type: Submission
| DOI:
10.82333/4n6h-yt79
Authors:
Marcus Lisy* 1
, Daniel Schartmüller 1
, Victor Danzinger 1
, Markus Schranz 1
, Nikolaus Mahnert 1
, Claudette Abela-Formanek 1
, Christina Leydolt 1
, Rupert Menapace 1
1Department of Ophthalmology and Optometry,Medical University of Vienna,Vienna,Austria
Purpose
To investigate the accuracy of toric intraocular lens (IOL) rotational stability measurement methods.
Setting
This single-center, retrospective comparative study was conducted at the Department of Ophthalmology and Optometry, Medical University of Vienna.
Methods
130 patients with mono or bilateral age-related cataract and corneal astigmatism exceeding one diopter received a hydrophobic acrylic toric Clareon CN0T3-9 (Alcon, Forth Worth, Texas). To evaluate rotational stability, three distinct assessment methods were used: (A) comparing the IOL axis at the end of surgery (EOS) to 1 week (1w) and 6 months (6m) using reference vessels at the sclera (Rotix), (B) comparing the intended axis (I/A) with the postoperative axis at 1w and 6m using slit-lamp photography (SL) with the horizontal axis as a reference and (C) comparing the I/A with the postoperative axis at 1w and 6m using the axis determination tool of a swept-source anterior segment OCT (AS-OCT) Casia 2 (Tomey, Nagoya, Japan). Differences between the three groups were evaluated.
Results
Mean absolute rotation from EOS/ IA to 6m for A, B and C was 1.33± 1.99 [0.01;19.80]°, 2.88± 2.64 [0.00; 19.00]° and 4.38± 3.38 [0.02;19.38]°, respectively. Mean absolute difference from EOS/IA to 6m between A and B, A and C and B and C was 3.90± 3.47 [0.02;19.98]°, 1.88± 1.64 [0.03;7.97]° and 3.13± 2.71 [0.03;13.53]°, respectively.
Conclusion
Compared to Rotix, AS-OCT and SL showed higher values for IOL rotation, approximately 2- and 3-fold higher, respectively. When considering Rotix as ground truth, as it has proven itself as reliable and consistent method for IOL-rotation assessment, significant discrepancy was found for AS-OCT and SL. The latter methods persuade in clinical routine due to their quick assessment mode, but caution is warranted when using horizontal axis as reference.