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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 64, Iss. 11 — Nov. 1, 1974
  • pp: 1512–1516

Accommodative response to blur

Leonard M. Smithline  »View Author Affiliations


JOSA, Vol. 64, Issue 11, pp. 1512-1516 (1974)
http://dx.doi.org/10.1364/JOSA.64.001512


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Abstract

By use of a blur-pseudostimulus technique and high-speed infrared optometric measurements, the singularity of blur as a stimulus to human accommodation was studied. Blur is not the sole stimulus; it is a necessary cue, but not a sufficient one. The accommodative system makes use of one or more available odd-error (error sign) cues, which are believed to supplement blur with requisite focusing information.

Citation
Leonard M. Smithline, "Accommodative response to blur," J. Opt. Soc. Am. 64, 1512-1516 (1974)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-64-11-1512


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References

  1. E. F. Fincham, Br. J. Ophthalmol. 35, 381 (1951).
  2. E. F. Fincham, Proc. Phys. Soc. Lond. 49, 456 (1937).
  3. L. Stark and Y. Takahashi, IEEE Trans. Bio.-Med. Eng. BME-12, 138 (1965).
  4. N. Roth, Rev. Sci. Instrum. 36, 1636 (1965).
  5. An even-error signal provides magnitude but no sign information about focusing errors. An odd-error signal does provide sign information.
  6. By the average absolute value of the response, we mean [∑1n |Rj(t)-R(0-)|]/n not [|Σ1nRj(t)| ]/n, where the Rj are the individual lens responses.
  7. K. Fujii, K. Kondo, and T. Kasai, Tech. Rep. Osaka Univ. 20, 925 (1970).
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  10. Individual variability in both need and efficacy of odd-error cues has been widely reported [E. F. Fincham, Br. J. Ophthalmol. 35, 381 (1951); Merrill J. Allen, Am. J. Opt. 32, 422 (1955); A. Troelstra, B. L. Zuber, D. Miller, and L. Stark, Vision Res. 4, 27 (1964); F. W. Campbell and G. Westheimer, J. Opt. Soc. Am. 49, 568 (1959)3.
  11. F. W. Campbell and G. Westheimer, J. Opt. Soc. Am. 49, 568 (1959).
  12. T. N. Cornsweet and H. D. Crane, NASA Report No. CR-2007 (1972).
  13. A. Troelstra, B. L. Zuber, D. Miller, and L. Stark, Vision Res. 4, 27 (1964).

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