Astigmatic Chart, Verhoeff's Astigmatic Chart, Verhoeff's. The concentric circles connecting the radial lines or spokes have a tendency to make the astigmatism Astigmatic Chart, Verhoeff's
Astigmatic Chart, Verhoeff's. The concentric circles connecting the radial lines or spokes have a tendency to make the astigmatism
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Source
Stoelting, C. H..
1931.
Tests for Color Perception, Visual and Auditory Acuity: Used in Railway, Miltary and Marine Services, also in the Arts and Sciences, for Research, Experimentation, Educational and Vocational Guidance.
(p. p0005, fig. 12035).
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