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 language | English (US) |
|---|---|
| Title of host publication | Progress in Biomedical Optics and Imaging - Proceedings of SPIE |
| Editors | F. Manns, P.G. Soederberg, A. Ho, B.E. Stuck, M. Belkin |
| Pages | 240-251 |
| Number of pages | 12 |
| Volume | 5688 |
| DOIs | |
| State | Published - 2005 |
| Event | Ophtalmic Technologies XV - San Jose, CA, United States Duration: Jan 22 2005 → Jan 25 2005 |
Other
| Other | Ophtalmic Technologies XV |
|---|---|
| Country | United States |
| City | San Jose, CA |
| Period | 1/22/05 → 1/25/05 |
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Keywords
- Accommodation simulation
- Crystalline lens
- Lens stretcher
- Restoring accommodation
ASJC Scopus subject areas
- Engineering(all)
Cite this
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 proceeding › Conference contribution
}
TY - GEN
T1 - Evaluation of porcine crystalline lenses in comparison with molded polymer gel lenses with an improved ex vivo accommodation simulator
AU - Ehrmann, Klaus
AU - Ho, Arthur
AU - Parel, Jean-Marie A
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
KW - Accommodation simulation
KW - Crystalline lens
KW - Lens stretcher
KW - Restoring accommodation
UR - http://www.scopus.com/inward/record.url?scp=21844451627&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=21844451627&partnerID=8YFLogxK
U2 - 10.1117/12.599223
DO - 10.1117/12.599223
M3 - Conference contribution
AN - SCOPUS:21844451627
VL - 5688
SP - 240
EP - 251
BT - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
A2 - Manns, F.
A2 - Soederberg, P.G.
A2 - Ho, A.
A2 - Stuck, B.E.
A2 - Belkin, M.
ER -