Fig. 9From: New pediatric vision screener, part II: electronics, software, signal processing and validationThe focus curve of the left eye (LE) of a 10-year old boy, to determine a “passing” threshold for focus. (C–A)/(C + A) is the focus goodness signal. The dashed line was obtained under cycloplegia. Shown is the 0.65 threshold used to discriminate between “passing” and “failing” focusBack to article page