Ex vivo accommodation simulator II - Concept and preliminary results

Klaus Ehrmann, Arthur Ho, Jean Marie Parel

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


A new instrument was developed to simulate the accommodation of excised human and animal crystalline lenses. The sciera is attached to 8 radially arranged translation stages and dissected into 8 segments. Change in accommodation is simulated by pulling and releasing the scleral segments, varying the load on the zonules and the capsular bag. Each translation stage is equipped with a sensitive force transducer for simultaneous recording of load and displacement. Additionally, changes in optical power, lens diameter, lens thickness and lens shape can be observed and quantified while the lens is stretched and released. The sensitivity and accuracy of the instrument was verified using steel springs and elastic bands. Preliminary results from sensitivity testing and instrument calibration are presented.

Original languageEnglish (US)
Article number5314-14
Pages (from-to)48-58
Number of pages11
JournalProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Issue number3
StatePublished - Dec 1 2004
EventOphthalmic Technologies XIV - San Jose, CA, United States
Duration: Jan 24 2004Jan 27 2004


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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


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