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Open access Oct 2026

Visual acuity: single-run confidence interval obtained via bootstrapping, implemented in the Freiburg Vision Test.

Whenever measuring, it is good practice to report not only an outcome point value, but also a measure of dispersion. This is rarely done for visual acuity. We here demonstrate that a confidence interval (CI) can be obtained for visual acuity based on all staircase responses. The CI is obtained via bootstrapping to cons...

M. Bach, B. Treutwein, Sven P. Heinrich · 0 citations
Open access Sep 2026

Landolt C acuity follows Bloch's Law for short-duration flashes

Bloch's Law states that up to a critical duration, typically between 30 and 100 ms, the detection of a flash depends on its total strength (the product of luminance and duration). This study investigated whether this principle of temporal summation extends to shape recognition, assessed via optotype-based visual ac...

Constantin C. Ketz, M. Bach, Sven P. Heinrich · 0 citations

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