The purpose of this protocol is to allow the pediatric and strabismus specialists at the National Eye Institute to gain additional knowledge of the course of various pediatric eye diseases and strabismus and to evaluate the effects of standard treatments for these diseases. This understanding may lead to ideas for future protocols. This protocol will also allow for the maintenance of populations of patients with specific pediatric eye diseases and strabismus that may be eligible for future protocols. In addition, by allowing for the care of persons with a spectrum of these diseases, the protocol will be valuable for the training of pediatric eye disease and ocular motility fellows. The pediatric and eye movement specialists at the National Eye Institute are free to choose those diseases that interest them.