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.
Noun. 1. ophthalmologist-a medical doctor specializing in the diagnosis and treatment of diseases of the eye. eye doctor, oculist. medical specialist, specialist-practices one branch of medicine.oun. 1. ophthalmologist-a medical doctor specializing in the diagnosis and treatment of diseases of the eye. eye doctor, oculist. medical specialist, specialist-practices one branch of medicine.