Evaluation of porcine crystalline lenses in comparison with molded polymer gel lenses with an improved ex vivo accommodation simulator

Klaus Ehrmann, Arthur Ho, Jean-Marie A Parel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The ex vivo accommodation simulator stretches crystalline lenses radially under controlled conditions, while monitoring the changes in zonular tension and lens diameter. A dual coaxial laser beam system was added for measuring changes in optical power as the lens is stretched. The EVAS instrument was fully characterized and calibrated. The results from 3 porcine eyes will be presented. Several crystalline lenses, similar in shape and size to porcine lenses, were cast molded in silicone gels of different stiffness. These lenses were evaluated using the EVAS instrument and custom made lens holding fixtures. With their well defined shape and material properties, results from these measurements will be useful for cross-validation of finite element models.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
EditorsF. Manns, P.G. Soederberg, A. Ho, B.E. Stuck, M. Belkin
Pages240-251
Number of pages12
Volume5688
DOIs
StatePublished - 2005
EventOphtalmic Technologies XV - San Jose, CA, United States
Duration: Jan 22 2005Jan 25 2005

Other

OtherOphtalmic Technologies XV
CountryUnited States
CitySan Jose, CA
Period1/22/051/25/05

Fingerprint

Lenses
Gels
Simulators
Crystalline materials
Polymers
Condition monitoring
Silicones
Laser beams
Materials properties
Stiffness

Keywords

  • Accommodation simulation
  • Crystalline lens
  • Lens stretcher
  • Restoring accommodation

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ehrmann, K., Ho, A., & Parel, J-M. A. (2005). Evaluation of porcine crystalline lenses in comparison with molded polymer gel lenses with an improved ex vivo accommodation simulator. In F. Manns, P. G. Soederberg, A. Ho, B. E. Stuck, & M. Belkin (Eds.), Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 5688, pp. 240-251). [40] https://doi.org/10.1117/12.599223

Evaluation of porcine crystalline lenses in comparison with molded polymer gel lenses with an improved ex vivo accommodation simulator. / Ehrmann, Klaus; Ho, Arthur; Parel, Jean-Marie A.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. ed. / F. Manns; P.G. Soederberg; A. Ho; B.E. Stuck; M. Belkin. Vol. 5688 2005. p. 240-251 40.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ehrmann, K, Ho, A & Parel, J-MA 2005, Evaluation of porcine crystalline lenses in comparison with molded polymer gel lenses with an improved ex vivo accommodation simulator. in F Manns, PG Soederberg, A Ho, BE Stuck & M Belkin (eds), Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 5688, 40, pp. 240-251, Ophtalmic Technologies XV, San Jose, CA, United States, 1/22/05. https://doi.org/10.1117/12.599223
Ehrmann K, Ho A, Parel J-MA. Evaluation of porcine crystalline lenses in comparison with molded polymer gel lenses with an improved ex vivo accommodation simulator. In Manns F, Soederberg PG, Ho A, Stuck BE, Belkin M, editors, Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 5688. 2005. p. 240-251. 40 https://doi.org/10.1117/12.599223
Ehrmann, Klaus ; Ho, Arthur ; Parel, Jean-Marie A. / Evaluation of porcine crystalline lenses in comparison with molded polymer gel lenses with an improved ex vivo accommodation simulator. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. editor / F. Manns ; P.G. Soederberg ; A. Ho ; B.E. Stuck ; M. Belkin. Vol. 5688 2005. pp. 240-251
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