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

Study Overview
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Brief Summary
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A novel dynamic random-dot stereopsis test that included motion + disparity (MD), motion (M), and disparity (D), in which the disparity cues range from 200 to 1200 arc-seconds was used. The characteristics of preoperative dynamic stereopsis in 83 intermittent exotropia patients and its associations with clinical features were analysed, and the prognosis was followed up on the 1st day and 2nd, 6th and 12nd months postoperatively.

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

Conditions
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Dynamic Stereopsis in Intermittent Exotropia Patients

Intervention / Treatment
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* Diagnostic Test: The dynamic stereopsis test


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

Ages Eligible for Study
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Minimum Age: 5 Years
Maximum Age: 30 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Intermittent exotropia group<br>Intermittent exotropia group | Diagnostic Test: The dynamic stereopsis test<br>* The characteristics of preoperative dynamic stereopsis in 83 intermittent exotropia patients and its associations with clinical features were analysed, and the prognosis was followed up on the 1st day and 2nd, 6th and 12nd months postoperatively.<br>|
| Normal group<br>Normal group | Diagnostic Test: The dynamic stereopsis test<br>* The characteristics of preoperative dynamic stereopsis in 83 intermittent exotropia patients and its associations with clinical features were analysed, and the prognosis was followed up on the 1st day and 2nd, 6th and 12nd months postoperatively.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The mean reciprocal value of stereopsis | The mean reciprocal value of stereopsis on the 1st day | 1st day | 
| The mean reciprocal value of stereopsis | The mean reciprocal value of stereopsis on the 2nd month | 2nd month | 
| The mean reciprocal value of stereopsis | The mean reciprocal value of stereopsis on the 6th month | 6th month | 
| The mean reciprocal value of stereopsis | The mean reciprocal value of stereopsis on the 6th month | 12th month |