Visual Perceptual Learning Based Digital Therapeutics for Stereopsis in Intermittent Exotropia

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