The relationship between night myopia under simulated night driving conditions and the dark focus of accommodation was examined. Over a range of luminance and contrast conditions typical of the night driving situation, college-age subjects accommodated to about one-half the difference between a distant simulated road sign and their individual dark focus. Subsequent laboratory and field experiments demonstrated that: (1) a negative correction equal to one-half the value of the dark focus significantly improved night visual performance as compared with their normal or full dark-focus correction, and (2) greater improvements in performance were obtained for subjects who exhibited a relatively near dark focus. /HSRI/

  • Supplemental Notes:
    • Sponsored by National Institute of Mental Health and presented at the Annual Meeting of the American Academy of Optometry, December 1975, Columbus, Ohio.
  • Corporate Authors:

    American Academy of Optometry

    6110 Executive Boulevard
    Rockville, MD  United States  29852
  • Authors:
    • Owens, D A
    • Leibowitz, H W
  • Publication Date: 1976-11

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00148985
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Contract Numbers: MH08061
  • Files: TRIS
  • Created Date: Apr 27 1977 12:00AM