Table 1 Classification of associated factors
Factor | Classification |
|---|---|
EOM | Classified as normal, mildly abnormal (mild overaction or underaction) or obviously abnormal (obvious overaction or underaction) |
Sensory fusion | Classified as normal or abnormal (suppression or diplopia) |
Stereo acuity | Classified as normal stereo (≤60s of arc), partial normal stereo (120 to 480 s of arc), or none (>  480 s of arc) |
Visual deficit | Defined as one or both eyes having a BCVA less than 20/60 |
Education level | Classified as higher education (college education and above), secondary education (community college and high school), primary education (middle school and primary school), or illiteracy |
Occupation | Classified as work with people (e.g., teacher, salesperson) or work without addressing people (e.g., technician, cook, construction worker) |