Ophthalmology is the study of the structure, function and diseases and dysfunctions of the visual organ, its appendages and the sense of sight and their medical treatment. It is one of the oldest medical subdisciplines. Ophthalmologist (synonym: ophthalmologist) is the professional title (first documented as ophthalmologist in 1401) of the specialist who deals with ophthalmology. Ophthalmology is one of the surgical subdisciplines, although it has numerous, effective and sophisticated medication and tools at its disposal. With cataract surgery, ophthalmology represents the most frequently performed surgery in medicine worldwide.
