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. 2023 Jul 24;9:43. doi: 10.1186/s40942-023-00481-w

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 3 — Feasibility experiments on porcine eyes a: Unproblematic insertion of a 3 mm 23G-polyimide cannula. The angulation of the trocar to place the trocar tip in the remaining oil bubble was easily achievable. b: Placement of the extraction sleeve over a 23G-trocar. In comparison to the shortest cannula, a fourfold increase of the volume aspirated in 5 ml was observed. Angulation of the trocar is not possible. Surgeons must be careful to not lose contact to the trocar during removal. c: The luer-trocar system allowed easy angulation of the trocar tip within the eye. The luer-trocar system had similar removal speeds as the extraction sleeve but offered preferable stability and surgical control