Anterior lens capsule strains during simulated accommodation in porcine eyes
Autor/a
Pellegrino, Antonio
Burd, Harvey John
Pinilla Cortés, Laura
D'Antin, Justin Christopher
Petrinic, Nik
Barraquer, Rafael I.
Michael, Ralph
Data de publicació
2018ISSN
0014-4835
Resum
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.
Tipus de document
Article
Versió del document
Versió publicada
Llengua
Anglès
Matèries (CDU)
617 - Cirurgia. Ortopèdia. Oftalmologia
Paraules clau
Oftalmologia
Oftalmología
Ophtalmology
Pàgines
8
Publicat per
Elsevier
Col·lecció
168
Publicat a
Experimental Eye Research
Citació
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
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