Binocular Dig Rush Game Treatment for Amblyopia

To compare the efficacy of 1 hour/day of binocular game play 5 days per week plus spectacle correction with spectacle correction only, for treatment of amblyopia in children 4 to \

Inclusion Criteria: 1. Age 4 to \1.00D. * Myopia must not be undercorrected by more than 0.25D or over corrected by more than 0.50D SE, and any change must be symmetrical in the two eyes. 2. Spectacle correction meeting the above criteria must be worn: * For at least 16 weeks OR until VA stability is documented (defined as \5∆ are not allowed because large magnitudes of the deviation would compromise successful playing of the game.) 7. Subject is able to play the Dig Rush game (at least level 3) on the study iPad under binocular conditions (with red-green glasses). Subject must be able to see both the red "diggers" and blue "gold carts" when contrast for the non-amblyopic eye is at 20%. 8. Investigator is willing to prescribe computer game play, or continued spectacle wear per protocol. 9. Parent understands the protocol and is willing to accept randomization. 10. Parent has phone (or access to phone) and is willing to be contacted by Jaeb Center staff or other study staff. 11. Relocation outside of area of an active PEDIG site for this study within the next 8 weeks is not anticipated. Exclusion Criteria: 1. Prism in the spectacle correction at time of enrollment (eligible only if prism is discontinued 2 weeks prior to enrollment). 2. Myopia greater than -6.00D spherical equivalent in either eye. 3. Previous intraocular or refractive surgery. 4. Any treatment for amblyopia (patching, atropine, Bangerter filter, vision therapy or previous binocular treatment) during the past 2 weeks. Previous amblyopia therapy is allowed regardless of type, but must be discontinued at least 2 weeks prior to enrollment. 5. Ocular co-morbidity that may reduce VA determined by an ocular examination performed within the past 7 months (Note: nystagmus per se does not exclude the subject if the above VA criteria are met). 6. No Down syndrome or cerebral palsy 7. No severe developmental delay that would interfere with treatment or evaluation (in the opinion of the investigator). Subjects with mild speech delay or reading and/or learning disabilities are not excluded. 8. Subject has demonstrated previous low compliance with binocular treatment and/or spectacle treatment (as assessed informally by the investigator)