Intermittent Exotropia
Conditions
Brief summary
This study evaluates the efficacy and safety of visual perceptual learning for improving stereopsis in intermittent exotropia. Half of participants will receive visual perceptual training using the Nu.T. The other half will not receive any training because there is no standard treatment for decreased stereopsis in intermittent exotropia.
Interventions
DEVICENu.T
Participants receive visual perceptual training using the Nu.T software.
OTHERNo-Treatment Control
No-treatment was administered during control period.
Sponsors
Nunaps Inc
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
6 Years to 15 Years
Healthy volunteers
No
Inclusion criteria
* Intermittent Exotropia patients aged 6 to 15 * Patients with decreased stereopsis above 50 arc seconds in Titmus Dot Test * Able to use the Virtual Reality(VR) device * Patient or legally authorized representative has signed the informed consent form
Exclusion criteria
* Incomitant strabismus patient with impaired eye movement * Patients with amblyopia (Maximal corrective vision of one eye is less than 0.8 or maximal corrective vision both eyes more than two lines of difference) * History of ophthalmic surgery * Patient who has undergone or is currently undergoing cover treatment within one month for the purpose of treating strabismus or amblyopia * Scheduled for ophthalmic surgery during the clinical trial participation period (8 weeks in the treatment group as of the registration date, Maximum 16 weeks in the control group as of the registration date) * Difficult to understand and perform the stereopsis test. * Abnormal Retinal Correspondence * Patient with neurological abnormalities other than strabismus * History of premature birth * Participating in other clinical trial * Any other condition that, in the opinion of the investigator, precludes participation in the trial
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Changes in (log) arc second of stereopsis from Baseline to 8 weeks | 8 weeks | Stereopsis will be evaluated by a Titmus Dot Test. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Changes of Stereopsis based on Titmus Symbol Test from baseline to 8 weeks | 8 weeks | Stereopsis will be evaluated by Titmus Symbol Test. |
| Changes of Stereopsis based on Distance Randot Stereotest from baseline to 8 weeks | 8 weeks | Stereopsis will be evaluated by Distance Randot Stereotest. |
| Proportion of subjects showing improved stereopsis at 8 weeks compared to baseline | 8 weeks | Improved stereopsis means more than 2 steps increase in Titmus Dot Test. |
| Changes of convergence capability score from baseline to 8 weeks | 8 weeks | Convergence capability will be evaluated in distance and near-field by LACTOSE System. The scores by LACTOSE System range from 0 to 4. |
| Changes of visuo-motor function from baseline to 8 weeks. | 8 weeks | Visuo-motor function will be evaluated by the Bruininks-Oseretsky Test of Motor Proficiency Second Edition (BOT-2) test. |
| Changes of strabismus angle from baseline to 8 weeks | 8 weeks | Strabismus angle will be evaluated by distance and near-field. |
Countries
South Korea
Outcome results
None listed