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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 28, Iss. 6 — Mar. 15, 1989
  • pp: 1103–1109

Modulation transfer functions and contrast sensitivity through low vision telescopes

Milton Katz, Dean Yager, Alan Lewis, Karl Citek, Nivian Sanchez, and Aries Arditi  »View Author Affiliations


Applied Optics, Vol. 28, Issue 6, pp. 1103-1109 (1989)
http://dx.doi.org/10.1364/AO.28.001103


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Abstract

Telescopes are coherently coupled to the eye. Because their wavefront aberrations may be altered by the optics of the eye, especially by accommodation, some researchers question the ability of their modulation transfer functions (MTF) to predict changes in contrast sensitivity functions (CSF) through them. We measured the CSFs of visually normal and aphakic subjects through telescopes. We found that MTF appears to be useful for ranking the telescopes, and accommodation appears to improve focus and partly balance wavefront errors. Our results suggest that cascading (multiplying the contrast of the instrumental MTF with the unaided CSF at each spatial frequency) is useful for predicting visually aided CSFs to within 4 dB.

© 1989 Optical Society of America

History
Original Manuscript: August 5, 1988
Published: March 15, 1989

Citation
Milton Katz, Dean Yager, Alan Lewis, Karl Citek, Nivian Sanchez, and Aries Arditi, "Modulation transfer functions and contrast sensitivity through low vision telescopes," Appl. Opt. 28, 1103-1109 (1989)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-28-6-1103


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References

  1. M. Katz, K. Citek, “Modulation Transfer Functions of Low Power Telescopes,” Am. J. Optom. Physiol. Opt. 65, 198 (1988). [CrossRef] [PubMed]
  2. M. Katz, K. Citek, I. Price, “Optical Properties of Low Power Telescopes,” J. Am. Optom. Assoc. 58, 320 (1987). [PubMed]
  3. D. Loshin, J. White, “Contrast Sensitivity: the Visual Rehabilitation of the Patient with Macular Degeneration,” Arch. Ophthalmol. 104, 1303 (1984). [CrossRef]
  4. I. Overington, “Interaction of Vision with Optical Aids,” J. Opt. Soc. Am. 63, 1043 (1973). [CrossRef] [PubMed]
  5. I. Overington, S. Gullick, “Evaluation of a Total System—Optics Plus Operator,” Opt. Acta 20, 49 (1973). [CrossRef]
  6. T. N. Cornsweet, Visual Perception (Academic, New York, 1970), p. 311. [CrossRef]
  7. N. P. Barton, “Application of the Optical Transfer Function to Visual Instruments,” in Proceedings, Electro-Optics, Brighton, England, 180 (1972).
  8. N. P. Barton, “MTF Testing and Specification for Afocal Systems,” Proc. Soc. Photo-Opt. Instrum. Eng. 46, 160 (1974).
  9. N. Fedorova, G. Fedorova, “Relationship Between MTF and Visual Resolution of a Telescope,” Sov. J. Opt. Technol. 47, 1 (1980).
  10. M. K. Giles, “Aberration Tolerances for Visual Optical Systems,” J. Opt. Soc. Am. 67, 634 (1977). [CrossRef] [PubMed]
  11. M. K. Giles, “Grating Detectability: a Method to Evaluate Aberration Effects in Visual Instruments,” Opt. Eng. 18, 33 (1979).
  12. P. Mouroulis, “Contrast Sensitivity in the Assessment of Visual Instruments,” Proc. Soc. Photo-Opt. Instrum. Eng. 274, 202 (1981).
  13. T. L. Williams, B. A. Leach, B. J. Biddles, “A Workshop Instrument for Testing Binocular and Other Sights Using MTF Criterion,” Opt. Laser Technol. 4, 115 (1972). [CrossRef]
  14. T. L. Williams, M. L. Nunn, N. P. Barton, “An Afocal System OTF Test Standard,” Opt. Acta 25, 1097 (1978). [CrossRef]
  15. G. J. Burton, “Effects of Modulation Transfer Function (MTF) and Phase Transfer Function (PTF) on Visual Performance,” Proc. Soc. Photo-Opt. Instrum. Eng. 274, 211 (1981).
  16. G. J. Burton, N. D. Haig, “Criteria for Testing of Afocal Visual Instruments,” Proc. Soc. Photo-Opt. Instrum. Eng. 274, 191 (1981).
  17. N. D. Haig, G. J. Burton, “Effects of Wavefront Aberration on Visual Instrument Performance, and a Consequential Test Technique,” Appl. Opt. 26, 492 (1987). [CrossRef] [PubMed]
  18. The Conrac Corp., Raster Graphics Handbook (Van Nostrand, New York, 1985).
  19. I. Ohzawa, Vision Metrics PC Pattern Generator Manual (Vision Metrics, Berkeley, CA, 1986).
  20. T. N. Cornsweet, “The Staircase-Method in Psychophysics,” Am. J. Psychol. 75, 485 (1962). [CrossRef] [PubMed]
  21. M. Katz, K. Citek, A. Arditi, “An Instrument for Measuring the Modulation Transfer Function of Low Power Telescopes and Telemicroscopes,” Am. J. Optom. Physiol. Opt. 65, 190 (1988). [CrossRef] [PubMed]
  22. G. Keppel, Design and Analysis: a Researcher’s Handbook (Prentice-Hall, Englewood Cliffs, NJ, 1973), p. 401.
  23. I. Bodis-Wollner, J. M. Camisa, “Contrast Sensitivity Measurement in Clinical Diagnosis,” in Neuro-Ophthalmology, Vol. 1, S. Lessell, J. T. W. Van Dalen, Eds. (Excerpta Medica, Amsterdam, 1980), p. 373.
  24. D. A. Owens, “A Comparison of Accommodative Responsiveness and Contrast Sensitivity for Sinusoidal Gratings,” Vision Res. 20, 159 (1980). [CrossRef] [PubMed]
  25. K. J. Ciuffreda, S. C. Hokoda, “Spatial Frequency Dependence of Accommodative Responses in Amblyopic Eyes,” Vision Res. 23, 1585 (1983). [CrossRef] [PubMed]
  26. W. N. Charman, “Effect of Refractive Error in Visual Tests with Sinusoidal Gratings,” Br. J. Physiol. Opt. 33, 10 (1979). [PubMed]
  27. W. N. Charman, H. Whitefoot, “Astigmatism, Accommodation, and Visual Instrumentation,” Appl. Opt. 17, 3903 (1978). [CrossRef] [PubMed]
  28. K. E. Higgins, M. J. Jaffe, N. J. Coletta, R. C. Caruso, F. M. de Monasterio, “Spatial Contrast Sensitivity: Importance of Controlling the Patient’s Visibility Criterion,” Arch. Ophthalmol. 102, 1035 (1984). [CrossRef] [PubMed]
  29. A. Tomlinson, G. Mann, “An Analysis of Visual Performance with Soft Contact Lens and Spectacle Correction,” Ophthalmol. Physiol. Opt. 5, 53 (1985). [CrossRef]

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