![]() ![]() Other sizes and colors are used for patients with late disease or retinal disease. Stimulus characteristics: 99% of visual fields (VFs) will use the size 3 white stimulus.Reliable tests have below 33% false negatives. ![]() False negative: The user did not see a stimulus which was brighter than one they saw earlier in the same test.Reliable tests have below 33% false positives. False positive: The user pressed the button when there was no stimulus. ![]() Reliable tests have below 20% fixation loss (although many people have their own opinions about these upper limits). VisualDiffer will spot these differences for you. If the patient can actually see the spot, then it’s recorded as a fixation loss. Use VisualDiffer to compare the contents of folders and files With files, you may want to look at changes in source code, HTML code, or other data.
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