Anterior lens capsule strains during simulated accommodation in porcine eyes
Author
Pellegrino, Antonio
Burd, Harvey John
Pinilla Cortés, Laura
D'Antin, Justin Christopher
Petrinic, Nik
Barraquer, Rafael I.
Michael, Ralph
Publication date
2018ISSN
0014-4835
Abstract
Experimental protocols have been developed to measure the spatial variation of the mechanical strains induced in the lens capsule during ex vivo lens stretching. The paper describes the application of these protocols to porcine lenses. The deformations and mechanical strains developed in the anterior capsule during each experiment were determined using full field digital image correlation techniques, by means of a speckle pattern applied to the lens surface. Several speckling techniques and illumination methods were assessed before a suitable combination was found. Additional data on the cross section shape of the anterior lens surface were obtained by Scheimpflug photography, to provide a means of correcting for lens curvature effects in the determination of the strains developed in the plane of the capsule. The capsule strains in porcine lenses exhibit non-linear behaviour, and hysteresis during loading and unloading. Peripheral regions experience higher magnitude strains than regions near the lens pole. The paper demonstrates the successful application of a procedure to make direct measurements of capsule strains simultaneously with ex vivo radial lens stretching. This experimental technique is applicable to future investigations on the mechanical characteristics of human lenses.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
617 - Surgery. Orthopaedics. Ophthalmology
Keywords
Oftalmologia
Oftalmología
Ophtalmology
Pages
8
Publisher
Elsevier
Collection
168
Is part of
Experimental Eye Research
Citation
Pellegrino, Antonio; Burd, Harvey John; Pinilla Cortés, Laura [et al.]. Anterior lens capsule strains during simulated accommodation in porcine eyes. Experimental Eye Research, 2018, 168, p. 19-27. Disponible en: <https://www.sciencedirect.com/science/article/abs/pii/S0014483517306048?via%3Dihub>. Fecha de acceso: 5 feb. 2024. DOI: 10.1016/j.exer.2017.12.008
This item appears in the following Collection(s)
- Ciències de la Salut [725]
Rights
© 2017 Elsevier Ltd. All rights reserved.