Prototype Of Virtual Eye Model For Visualization Of Toric Intraocular Lens Position
Published 2022
- 40th Congress of the ESCRS
Reference: PE026
| Type: ESONT - Abstract
| DOI:
10.82333/4ybc-9r12
Authors:
Martin Fus* 1
, Sarka Pitrova 1
, Jiri Chludil 2
1Department of Natural Sciences,Faculty of Biomedical Engineering, Czech Technical University in Prague,Kladno,Czech Republic, 2Department of Computer Science and Engineering,Faculty of Information Technology, Czech Technical University in Prague,Prague,Czech Republic
Purpose
The aim of the study was to create a universal software design for objective analysis of postoperative positional parameters of the toric intraocular lens and to present their use for virtual 3D modeling of the patient's eye.
Setting/Venue
FBMI, Czech Technical University in Prague in cooperaction with Eye Clinic JL.
Methods
Images from the Verion system and the Visucam photographic system were used to determine the alignment and decentration of the intraocular lens (SN6ATx), and the axial position of the IOL (Lenstar) and tilt (OCT Avanti) were evaluated using custom software design (Microsoft Visual Studio). All these parameters were analyzed in 67 eyes. The Blender graphics engine was used to render and create a script for parametric modification of the virtual model of the prototype eye.
Results
Custom software was designed and used for postoperative analysis and also for visualization of the 3D virtual eye model. The angular position analysis was validated by two approaches: there was a mean difference of 1.7 ± 1.13 degrees (67.16% of eyes within 2 degrees) between the approximation values using haptics and the direct measurement using markin points. The output of the decentration measurement is the individual value of the vector relative to the pupil or visual axis. The highest (mean = 3.65 degrees) and the perpendicular (mean = 0.62 degrees) meridian of tilt were evaluated.
Conclusions
The proposed software can be used for objective postoperative evaluation of the position parameters of the toric IOL in the capsular bag. The position of the toric IOL can be visualized in a 3D model in an interactive interface that can be implemented in augmented reality in the operating room.