The main objective of this study is to evaluate the agreement and consistency between measurements of the visual system taken at two different times to determine the test-retest reliability of the seven binocular vision tests. To do so, the results of each test will be analyzed individually. If the tests are perfectly reliable, it is expected that the value of the first test is equal to the value of the second test for each participant across the range of values for all individuals. Reliability will be assessed using the intra-class coefficient (ICC) which measures the between-group variance divided by the total variance (sum of between- and within-group variance). The difference between the first and second test for each participant is called the within-group (each participant represents a group) variance. The difference across individuals is the between-group variance. If the within-group variance is 0 (first and second measures are identical), then the ICC = 1 (between-group variance / (between-group variance + 0)). In addition to the ICC, limits of agreement will be estimated using the paired data and illustrated via Bland-Altman plot (Bland & Altman, 1986).