ESCRS - PO0171 - Performance Of A New Biomechanical Index For Post-Laser Vision Correction Ectasia Diagnosis

Performance Of A New Biomechanical Index For Post-Laser Vision Correction Ectasia Diagnosis

Published 2023 - 41st Congress of the ESCRS

Reference: PO0171 | Type: Case report | DOI: 10.82333/y1gm-2y27

Authors: Nanji Lu* 1 , Carina Koppen 2 , Jos Rozema 2 , Paolo Vinciguerra 3 , Le-Le Cui 4 , Riccardo Vinciguerra 5

1Ophthalmology,University of Antwerp,Antwerp,Belgium;Wenzhou Medical University,Wenzhou,China, 2Ophthalmology,University of Antwerp,Antwerp,Belgium, 3Biomedical Sciences,Humanitas University,Milan,Italy;Humanitas Clinical and Research Center - IRCCS,Milan,Italy, 4Ophthalmology,Wenzhou Medical University,Wenzhou,China, 5Humanitas San Pio X Hospital,Milan,Italy;The School of Engineering,University of Liverpool,Liverpool,United Kingdom

To validate the performance of a new biomechanical index, Corvis Biomechanical Index for Laser Vision Correction (CBI-LVC), in diagnosing post-laser vision correction (LVC) ectasia.

 

Wenzhou Medical University; Humanitas San Pio X Hospital; University of Antwerp

 

Fifteen post-LVC ectasia patients confirmed by Scheimpflug tomography and visual acuity were included: thirteen patients had undergone laser assisted in situ keratomileusis (LASIK), 1 patient had undergone sub-Bowman's keratomileusis (SBK), and 1 patient had undergone laser-assisted subepithelial keratectomy (LASEK). The mean age at surgery was 23.13 ± 5.19 years old and the mean postoperative time for post-LVC ectasia to occur was 10.67 ± 5.51 years. CBI-LVC values, provided by the Corvis Scheimpflug tonometer (Oculus Optikgeräte, Wetzlar, Germany), showed that all corneas diagnosed as post-LVC ectasia scored more than 0.5, while most normal post-LVC corneas scored 0. Two corneas with early signs of post-LVC ectasia showed increased CBI-LVC values.

 

CBI-LVC is able to detect post-LVC ectasia, especially for post-LASIK eyes, making it a potentially useful tool in clinical practice. The post-LVC corneas with increased CBI-LVC that could not be confirmed by the tomography alone need closer follow-up.