Ophthalmology

n. branch of medicine that is concerned with the study of the eye (i.e. structure, diseases, and treatments)

Ophthalmology is the branch of medicine which deals with the diseases and surgery of the visual pathways, including the eye, brain, and areas surrounding the eye, such as the lacrimal system and eyelids. The word ophthalmology comes from the Greek roots ophthalmos meaning eye and logos meaning word, thought or discourse; ophthalmology literally means "The science of eyes." As a discipline it applies to animal eyes also, since the differences from human practice are surprisingly minor and are related mainly to differences in anatomy or prevalence, not differences in disease processes. However, veterinary medicine is regulated separately in many countries and states/provinces resulting in few ophthalmologists treating both humans and animals. By convention the term ophthalmologist is more restricted and implies a medically trained specialist. Since ophthalmologists perform operations on eyes, they are generally categorized as surgeons.
See more at Wikipedia.org...

Ophthalmology /oph·thal·mol·o·gy/ the branch of medicine dealing with the eye, including its anatomy, physiology, and pathology. [more]Ophthalmology - Community and Resources

Noun
1. the branch of medicine concerned with the eye and its diseases
(hypernym) medicine, medical specialty
(class) hyperopic, hypermetropic

(n.)
The science which treats of the structure, functions, and diseases of the eye.