Modelling the performance of accommodating intraocular lenses

A. Ho, Fabrice Manns, T. Pham, S. Evans, Jean-Marie A Parel

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

1 Citation (Scopus)

Abstract

Pseudo-accommodating intra-ocular lenses (P-IOL) have been available for some time and the availability of accommodating IOL (A-IOL) is imminent. While these types of devices have been tested empirically, few studies have addressed the fundamental parameters governing their performance limits. We modelled the amplitude of accommodation of A-IOLs and P-IOLs to analyse parameters controlling their performance. Methods. Two types of two-element A-IOLs (those with a mobile anterior optical element, or a mobile posterior element) were modelled. Paraxial models were developed to identify key controlling parameters and potential optimal configurations, followed by finite modelling using computer assisted ray-tracing employing equi-convex/concave optical elements. A range of configurations representing varying focal lengths of front and back optical elements were tested. Degenerate cases representing P-IOLs were also tested. Results. P-IOLs have limited rate of pseudo-accommodation with axial shift (approximately 1.2D/mm). For A-IOLs, configurations with positive power front elements returned best rate of accommodation (up to approximately 3.0D/mm when the front element focal length is 25 mm). Conclusions. Considering the maximum potential amounts of axial shifts available, P-IOLs were predicted to provide less than ID of accommodation whereas A-IOLs may provide up to 3-4D of accommodation, depending on design configuration.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
EditorsF. Manns, P.G. Soederberg, A. Ho
Pages36-47
Number of pages12
Volume5
Edition3
DOIs
StatePublished - 2004
EventOphthalmic Technologies XIV - San Jose, CA, United States
Duration: Jan 24 2004Jan 27 2004

Other

OtherOphthalmic Technologies XIV
CountryUnited States
CitySan Jose, CA
Period1/24/041/27/04

Fingerprint

Intraocular lenses
Optical devices
Ray tracing
Availability

Keywords

  • Accommodation
  • Intraocular lens
  • Modelling
  • Pseudo-accommodation
  • Ray-tracing

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ho, A., Manns, F., Pham, T., Evans, S., & Parel, J-M. A. (2004). Modelling the performance of accommodating intraocular lenses. In F. Manns, P. G. Soederberg, & A. Ho (Eds.), Progress in Biomedical Optics and Imaging - Proceedings of SPIE (3 ed., Vol. 5, pp. 36-47). [5314-12] https://doi.org/10.1117/12.540879

Modelling the performance of accommodating intraocular lenses. / Ho, A.; Manns, Fabrice; Pham, T.; Evans, S.; Parel, Jean-Marie A.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. ed. / F. Manns; P.G. Soederberg; A. Ho. Vol. 5 3. ed. 2004. p. 36-47 5314-12.

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

Ho, A, Manns, F, Pham, T, Evans, S & Parel, J-MA 2004, Modelling the performance of accommodating intraocular lenses. in F Manns, PG Soederberg & A Ho (eds), Progress in Biomedical Optics and Imaging - Proceedings of SPIE. 3 edn, vol. 5, 5314-12, pp. 36-47, Ophthalmic Technologies XIV, San Jose, CA, United States, 1/24/04. https://doi.org/10.1117/12.540879
Ho A, Manns F, Pham T, Evans S, Parel J-MA. Modelling the performance of accommodating intraocular lenses. In Manns F, Soederberg PG, Ho A, editors, Progress in Biomedical Optics and Imaging - Proceedings of SPIE. 3 ed. Vol. 5. 2004. p. 36-47. 5314-12 https://doi.org/10.1117/12.540879
Ho, A. ; Manns, Fabrice ; Pham, T. ; Evans, S. ; Parel, Jean-Marie A. / Modelling the performance of accommodating intraocular lenses. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. editor / F. Manns ; P.G. Soederberg ; A. Ho. Vol. 5 3. ed. 2004. pp. 36-47
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