Iol Power Calculation After Klex With The Novel Escrs Post Keratorefractive Surgery Calculator
Published 2025
- 43rd Congress of the ESCRS
Reference: PP23.09
| Type: Free paper
| DOI:
10.82333/tj0d-jp07
Authors:
Jing Zhao* 1
, Yong Ma 1
, Teruko Fukuyama 1
, Xintao Zhou 1
1Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University,ShangHai,China
Purpose
To compare the intraocular lens (IOL) power calculation accuracy after keratorefractive lenticule extraction (KLEx) between the novel ESCRS online calculator and ray tracing as the current gold standard after KLEx.
Setting
Multicenter study conducted at University Eye Hospital of Ludwig-Maximilians-University (Munich, Germany), SMILE Eyes Clinics in Munich Airport, Trier, Marburg (Germany), and Linz (Austria).
Methods
The study included patients who had previously undergone SMILE (KLEx) and subsequently underwent cataract surgery with IOL implantation. Ray tracing (Okulix) and the European Society of Cataract and Refractive Surgery (ESCRS) online calculator (Barrett True-K post-LVC, Hoffer-QST post-LVC and EVO post-LVC) were used for post-hoc intraocular lens (IOL) power calculation. The accuracy, trueness and precision of each method was descriptively compared between methods.
Results
Nine eyes of seven patients were included in this stuy. The EVO post-LVC formula demonstrated the lowest mean error of -0.08±0.58D, followed by ray tracing with -0.22±0.43D and the Barrett True-K post LVC formula (-0.22±0.74D). Both, ray tracing and EVO post-LVC achieved a ±1.00 D accuracy of 100%. Ray tracing exhibited the smallest mean absolute error of 0.41 D.
Conclusions
Ray tracing and ESCRS post-LVC formulas enhance IOL power calculations for post-KLEx eyes undergoing cataract surgery, highlighting the necessity for tailored approaches in this patient group.