Please use this identifier to cite or link to this item: doi:10.22028/D291-27427
Title: Eye-Tracker-Guided Non-Mechanical Excimer Laser Assisted Penetrating Keratoplasty
Author(s): Janunts, Edgar
Schirra, Frank
Szentmáry, Nora
Seitz, Berthold
Langenbucher, Achim
Language: English
Title: Sensors
Volume: 13
Issue: 3
Startpage: 3753
Endpage: 3764
Publisher/Platform: MDPI
Year of Publication: 2013
DDC notations: 610 Medicine and health
Publikation type: Journal Article
Abstract: Purpose: The purpose of the study was to implement a new eye tracking mask which could be used to guide the laser beam in automated non-mechanical excimer laser assisted penetrating keratoplasty. Materials and methods: A new trephination mask design with an elevated surface geometry has been proposed with a step formation between conical and flat interfaces. Two recipient masks of 7.5/8.0 mm have been manufactured and tested. The masks have outer diameter of 12.5 mm, step formation at 10.5 mm, and slope of conical surfaces 15°. Its functionality has been tested in different lateral positions and tilts on a planar surface, and pig eye experiments. After successful validation on porcine eyes, new masks have been produced and tested on two patients. Results: The build-in eye tracking software of the MEL 70 was always able to capture the masks. It has been shown that the unwanted pigmentation/pattern induced by the laser pulses on the mask surface does not influence the eye-tracking efficiency. The masks could be tracked within the 18 × 14 mm lateral displacement and up to 12° tilt. Two patient cases are demonstrated. No complications were observed during the surgery, although it needs some attention for aligning the mask horizontally before trephination. Stability of eye tracking masks is emphasized by inducing on purpose movements of the patient head. Conclusion: Eye-tracking-guided penetrating keratoplasty was successfully applied in clinical practice, which enables robust tracking criteria within an extended range. It facilitates the automated trephination procedure of excimer laser-assisted penetrating keratoplasty.
DOI of the first publication: 10.3390/s130303753
Link to this record: urn:nbn:de:bsz:291--ds-274270
ISSN: 1424-8220
Date of registration: 3-Jan-2020
Faculty: M - Medizinische Fakultät
Department: M - Augenheilkunde
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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