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

Completed

• Conditions: Dynamic Stereopsis in Intermittent Exotropia Patients
• Interventions: Diagnostic Test: The dynamic stereopsis test

• Registration Number: NCT04152122
• Lead Sponsor: Zhongshan Ophthalmic Center, Sun Yat-sen University

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2017-02-01
• Primary Completion: 2018-06-01
• Study Completion: 2018-06-01
• Study First Submitted: 2019-10-31
• Status Verified: 2019-11
• Study First Submitted QC: 2019-11-01
• Last Update Submitted: 2019-11-01
• Study First Posted: 2019-11-05
• Last Update Posted: 2019-11-05

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 133

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.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Intermittent exotropia group	The dynamic stereopsis test	Intermittent exotropia group
Normal group	The dynamic stereopsis test	Normal group

Primary Outcome Measures

Name	Time	Method
The mean reciprocal value of stereopsis	12th month	The mean reciprocal value of stereopsis on the 6th month

Trial Locations

Locations (1)

Zhongshan Opthalmic Center; 🇨🇳 Guangzhou, Guangdong, China