Furthermore, for health measures - such as the binocular vision tests - to be useful in clinically guiding patient management, they must be valid and sensitive to the system of interest (i.e. visual system). We are currently unable to quantify the validity of these binocular vision tests as this domain lacks a "gold-standard" (Hachana et al., 2013), thus, test-retest reliability must be determined first (Broglio et al., 2007). Therefore, this study aims to determine the test-retest reliability of seven binocular vision tests across two independent measurements. Twenty healthy participants aged 18 to 35 years will be measured on two separate occasions, one week apart. Since these tests have been in use for many decades, it is hypothesized that the two measurements will be within acceptable range of each other.