Letter Similarity Data Set Archive


Reich, L.N., & Bedell, H.E., 2000

Reich, L. N., & Bedell, H. E. (2000). Relative legibility and confusions of letter acuity in the peripheral and central retina. Optometry and Vision Science, 77(5), 270-275.

Summary:

Experimenters tested and compared legibility and letter confusion between the fovea and at 10 degree in the peripheral retina.

Procedure:

Uppercase Sloan letters were shown on a computer monitor at fovea and at 10 degrees in temporal, superior, and superior-temporal retina.

Stimuli

Experiment repoarted using sloan lettering. (Sloan lettering shown here produced using Pelli et al.'s (1988) Sloan font, not from paper directly.)

Results

The range of relative legibility was greater in the periphery than the fovea. There were many of the same confusion pairs in fovea and periphery, but additional confusion pairs involving curved letters were found only in the periphery.

Confusion values for letter pairs in fovea


Confusion values for letter pairs in temporal retina


Confusion values for letter pairs in superior temporal retina


Confusion values for letter pairs in superior retina


Confusion data as excel workbook

References

1. Reich, L. N., & Bedell, H. E. (2000). Relative legibility and confusions of letter acuity in the peripheral and central retina. Optometry and Vision Science, 77(5), 270275

2. Pelli, D. G., Robson, J. G., & Wilkins, A. J. (1988) The design of a new letter chart for measuring contrast sensitivity. Clinical Vision Sciences 2, 187-199.

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