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Proceedings Paper

In-situ pre- and postoperative optical resolution of the lens and pseudo-phacos: a preliminary report
Author(s): Jean-Marie A. Parel; Gabriel Simon; Pascal O. Rol; William E. Lee; David B. Denham; Qiushi Ren
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Paper Abstract

The effect of novel intraocular implants and refractive surgical techniques on visual acuity and contrast sensitivity is normally determined by the outcome of human clinical trials. Even if intraocular lenses (IOL) are optically `bench tested' prior to implantation, and their contribution to the patient's vision modeled by computer simulation, the clinical outcome is often poorer than mathematically predicted. This is due in large part to the approximations made in the schematic eye used for computation and the biological variables, such as iris geometry, the implant centration, and location with respect to the three-dimensional position of the visual axis and foveal plane. In vitro laboratory optical testing of novel IOLs and lens refractive procedures, such as capsular bag refilling and inflatable balloons, are non-existent. As animal experiments cannot resolve this dilemma, we took a new in vitro approach at assessing the vision of surgically modified and/or implanted human eyes. Using stock parts, a new optical instrument was built to measure the in situ optical resolution and OMTF of fresh cadaver eyes and to comparatively assess novel surgical techniques and implants by pre- and postoperative optical measurements of the retinal image.

Paper Details

Date Published: 24 June 1993
PDF: 4 pages
Proc. SPIE 1877, Ophthalmic Technologies III, (24 June 1993); doi: 10.1117/12.147558
Show Author Affiliations
Jean-Marie A. Parel, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)
Univ. de Paris (France)
Univ. of Miami College of Engineering (United States)
Gabriel Simon, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)
Pascal O. Rol, ETH Univ. of Zurich (Switzerland)
Univ. of Miami College of Engineering (United States)
William E. Lee, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)
David B. Denham, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)
Qiushi Ren, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)
Univ. of Miami College of Engineering (United States)


Published in SPIE Proceedings Vol. 1877:
Ophthalmic Technologies III
Jean-Marie A. Parel; Qiushi Ren, Editor(s)

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