The purpose of this protocol is to allow the pediatric ophthalmology, genetic ophthalmology, and ocular motility specialists at the National Eye Institute to gain additional knowledge of the course of various pediatric, genetic, developmental and ocular motility diseases. Heretofore, this spectrum of diseases will be referred to as pediatric ophthalmology diseases. We wish to evaluate the effects of standard treatments for these diseases, use non- or minimally-invasive technologies to understand the pathogenesis of these diseases, and to collect blood or other easily obtained biologic sample (e.g., urine, saliva, hair, cheek swab, or stool) for future laboratory studies on these diseases. The information gained from 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 patients with a spectrum of these diseases, the protocol will be valuable for the training of pediatric eye disease, ocular genetics, and ocular motility fellows. The pediatric, genetic, and eye movement specialists at the National Eye Institute will choose ophthalmology diseases based on the training and research needs of the NEI program. While the primary focus of this protocol is to study eye disease in children, adults who have a disease that began in childhood or who may have an inherited eye disease or are unaffected first-degree relatives may also be evaluated under this protocol.