Dichoptic Treatment for Amblyopia in Children 4 to 7 Years of Age

Inclusion Criteria

• •1. Age 4 to 7 years.
• •2. Visual acuity, measured in each eye without cycloplegia in current refractive correction (if applicable) using the ATS-HOTV VA protocol on a study-approved device displaying single surrounded optotypes, as follows:
• •1. VA in the amblyopic eye 20/40 to 20/200 inclusive.
• •2. Age-normal VA in the fellow eye:44,45
• •• 4 years: 20/40 or better; 5-6 years: 20/32 or better; 7 years: 20/25 or better
• •3. Interocular difference ≥ 3 logMAR lines (i.e., amblyopic eye VA at least 3 logMAR lines worse than fellow eye VA).
• •3. Amblyopia associated with strabismus, anisometropia, or both (previously treated or untreated).
• •1. Criteria for strabismic amblyopia: At least one of the following must be met:
• •* Presence of a heterotropia on examination at distance or near fixation (with optical correction), must be \<=5 prism diopters (∆) by SPCT at distance and near fixation (see #7 below).
• •* Documented history of strabismus which is no longer present (which in the judgment of the investigator could have caused amblyopia).
• +47 more criteria