Disclosed herein are methods and systems of evaluating test-retest precision using fractional rank precision or mean-average precision, comprising: a) collecting a test and a retest result of each subject, wherein the results are described in feature space(s) and collected from a vision test machine； b) selecting, a first test result of a first subject； c) calculating distances from the first test result to the retest result of each subject； d) assessing, a similarity between the first test result and the retest result of each subject by ranking the distances in a non-descending order； e) assessing a rank precision for the first subject based on a rank of a distance from the first test result to the retest result of the first subject； f) repeating b), c), d), and e) for each subject； and evaluating, the test-retest precision based on the rank precision for each of the plurality of subjects.
