This study will evaluate and treat children or adults with inherited or developmental eye conditions. It will allow specialists in pediatric ophthalmology, genetic ophthalmology, and ocular motility at the National Eye Institute (NEI) to learn more about the course of various pediatric, genetic, developmental, and eye movement diseases thorough long-term observation and treatment. It will also serve as the first step in determining the eligibility of patients who may wish to enroll in other NEI clinical research studies or undergo standard eye treatments.