Eye care is divided into four critical areas:
Vision science - the study of the visual system to better understand how vision, visual perception, and visual processing occurs
Optician - fit and in some countries prescribe glasses and contact lenses
Optometry - prescribe glasses and contact lenses and can provide health exams and treatment for the eye and visual system
Ophthalmology - prescribe glasses and contact lenses and can provide health exams and treatment for the eye and visual system as well as surgical intervention for the eye and surrounding areas