Tolerance to visual defocus.

@article{Legge1987ToleranceTV,
  title={Tolerance to visual defocus.},
  author={Gordon E. Legge and Kathy T. Mullen and George C. Woo and F. W. Campbell},
  journal={Journal of the Optical Society of America. A, Optics and image science},
  year={1987},
  volume={4 5},
  pages={851-63}
}
Low-resolution optical systems are more tolerant to defocus than are high-resolution systems. We wished to determine whether this principle applies to human vision. We used psychophysical methods to measure the effects of defocus in normal eyes under low-resolution conditions. Modulation transfer of sine-wave gratings was measured as a function of dioptric defocus at low and medium spatial frequencies. We defined the depth of focus at a given spatial frequency to be the dioptric range for which… CONTINUE READING
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