A Novel Dynamic Random-dot Stereopsis Assessment to Measure the Stereopsis in Intermittent Exotropia

Inclusion Criteria: X(T) groups were as follows: 1. near and distance exodeviation angles greater than 5 prism degrees (PD) and alternate cover tests and X(T) diagnosis by an experienced doctor; 2. between 5 and 30 years old; 3. 0.0 or better best corrected visual acuity (BCVA; logMAR, log of the minimum angle of resolution); 4. absence of other ocular disorders or other systemic diseases. Normal group were as follows: 1. between 5 and 30 years old; 2. 0.0 or better logMAR BCVA; 3. near and distance exodeviation angles less than 5 PD and alternate cover tests; and 4. no history of any ocular pathology or systemic disease. Exclusion Criteria: X(T) groups were as follows: 1. near and distance exodeviation angles less than 5 prism degrees (PD) 2. younger than 5 or older than 30 years old; 3. less than 0.0 or better best corrected visual acuity (BCVA; logMAR, log of the minimum angle of resolution); 4. has other ocular disorders or other systemic diseases. Normal group were as follows: 1. younger than 5 or older than 30 years old; 2. less than 0.0 or better best corrected visual acuity (BCVA; logMAR, log of the minimum angle of resolution); 3. near and distance exodeviation angles more than 5 PD and alternate cover tests; 4. has history of any ocular pathology or systemic disease.