Field of vision is a term used to describe the area that can be seen by an individual at any given time. Optics, which is a 6 letter word, is the branch of physics that studies the behavior and properties of light, including its interactions with matter and the construction of instruments that use or detect it. SCOPE, which is a 5 letter word, is a device used to view objects at a distance, such as a telescope or microscope. Orthoptics, which is a 10 letter word, is a branch of ophthalmology that deals with the diagnosis and treatment of disorders of binocular vision, eye movements, and eye coordination.