Letters-in-Noise ChartDownload chart as high resolution JPEG. (Click and hold for pop-up menu. Save to disk.) Pelli, D. G., & Hoepner,
J. A. (1989) Letters in noise: A visual test chart that bypasses the
optics. In: Noninvasive Assessment of the Visual System, 1989 Technical
Digest Series, 7 (pp. 103-106). Washington, DC: Optical Society of America.
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