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Proceedings Paper

Characterization and operation of a liquid crystal adaptive optics phoropter
Author(s): Abdul Ahad Sami Awwal; Brian J. Bauman; Donald T. Gavel; Scot S. Olivier; Steve Jones; Dennis A. Silva; Joseph L. Hardy; Thomas B. Barnes; John S. Werner
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Paper Abstract

Adaptive optics (AO), a mature technology developed for astronomy to compensate for the effects of atmospheric turbulence, can also be used to correct the aberrations of the eye. The classic phoropter is used by ophthalmologists and optometrists to estimate and correct the lower-order aberrations of the eye, defocus and astigmatism, in order to derive a vision correction prescription for their patients. An adaptive optics phoropter measures and corrects the aberrations in the human eye using adaptive optics techniques, which are capable of dealing with both the standard low-order aberrations and higher-order aberrations, including coma and spherical aberration. High-order aberrations have been shown to degrade visual performance for clinical subjects in initial investigations. An adaptive optics phoropter has been designed and constructed based on a Shack-Hartmann sensor to measure the aberrations of the eye, and a liquid crystal spatial light modulator to compensate for them. This system should produce near diffraction-limited optical image quality at the retina, which will enable investigation of the psychophysical limits of human vision. This paper describes the characterization and operation of the AO phoropter with results from human subject testing.

Paper Details

Date Published: 24 December 2003
PDF: 19 pages
Proc. SPIE 5169, Astronomical Adaptive Optics Systems and Applications, (24 December 2003); doi: 10.1117/12.510393
Show Author Affiliations
Abdul Ahad Sami Awwal, Lawrence Livermore National Lab. (United States)
Brian J. Bauman, Lawrence Livermore National Lab. (United States)
Donald T. Gavel, Lawrence Livermore National Lab. (United States)
Scot S. Olivier, Lawrence Livermore National Lab. (United States)
Steve Jones, Lawrence Livermore National Lab. (United States)
Dennis A. Silva, Lawrence Livermore National Lab. (United States)
Joseph L. Hardy, Univ. of California/Davis Medical Ctr. (United States)
Thomas B. Barnes, Univ. of California/Davis Medical Ctr. (United States)
John S. Werner, Univ. of California/Davis Medical Ctr. (United States)


Published in SPIE Proceedings Vol. 5169:
Astronomical Adaptive Optics Systems and Applications
Robert K. Tyson; Michael Lloyd-Hart, Editor(s)

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