Characterization and operation of a liquid crystal adaptive optics phoropter

Abdul Awwal, Brian Bauman, Don Gavel, Scot Olivier, Steve Jones, Dennis Silva, Joseph L. Hardy, Thomas Barnes, John S Werner

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

16 Scopus citations

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.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsR.K. Tyson, M. Lloyd - Hart
Pages104-122
Number of pages19
Volume5169
StatePublished - 2003
EventAstronomical Adaptive Optics Systems and Applications - San Diego, CA, United States
Duration: Aug 3 2003Aug 4 2003

Other

OtherAstronomical Adaptive Optics Systems and Applications
CountryUnited States
CitySan Diego, CA
Period8/3/038/4/03

Keywords

  • Adaptive optics
  • Liquid crystal
  • Ophthalmology
  • Psychophysics
  • Spatial light modulator
  • Vision science
  • Visual acuity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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  • Cite this

    Awwal, A., Bauman, B., Gavel, D., Olivier, S., Jones, S., Silva, D., Hardy, J. L., Barnes, T., & Werner, J. S. (2003). Characterization and operation of a liquid crystal adaptive optics phoropter. In R. K. Tyson, & M. Lloyd - Hart (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 5169, pp. 104-122)