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. Author manuscript; available in PMC: 2017 Feb 21.
Published in final edited form as: Doc Ophthalmol. 2009 Nov 3;119(3):217–224. doi: 10.1007/s10633-009-9204-7

Fig. 1.

Fig. 1

Representative D-FST functions in patients. The solid black bar denotes the normal range, the white square within the bar the normal mean. The solid curve is the Weibull function. Data-points are shown as solid triangles, which are partially obscured at 0%. a D-FST of a 5-year-old female with LCA. Visual acuity was LP, and both rod and cone ERGs were non-detectable (<2.0 and <0.1 μV, respectively). Her D-FST threshold of −22.5 dB (solid black rectangle) corresponds to −0.85 log cd/m2. b Example of a D-FST from a second patient where the floor did not reach 0% probability due to patient errors (indicated in box). The Weibull function adjusts the floor, ceiling and threshold accordingly