Name from west to east the four Great Lakes shared by Canada and the US Lake Superior, Lake Huron, Lake Erie, Lake Ontario Name the Great Lake that lies entirely in the boundaries of the US.
Definition of ophthalmology for English Language Learners. medical : the study of the structure, functions, and diseases of the eye.
Anophthalmia Definition. Anophthalmia, also referred to as Anophthalmos, is a congenital defect that leads to absence of the eyes in a newborn. It is a very rare condition characterized by the lack of the ocular tissue and the globe of the eye. This defect can occur both unilaterally (affecting one eye) and bilaterally (involving both eyes).