Question: Who has the highest scope of profession in Troy Duffy or David Lean 

Context articles: Optometry
David Della Rocco
David Lean
The Boondock Saints
David Lean filmography
Troy Duffy
National Association for Chiropractic Medicine
The Sound Barrier
David Lean Cinema
Oliver Twist (1948 film)

Optometry is a health care profession which involves examining the eyes and applicable visual systems for defects or abnormalities as well as the medical diagnosis and management of eye disease.
 Traditionally, the field of optometry began with the primary focus of correcting refractive error through the use of spectacles.
 Modern day optometry, however, has evolved through time so that the education curriculum additionally includes intensive medical training in the diagnosis and management of ocular disease in countries where the profession is established and regulated.
 Optometrists (also known as Doctors of Optometry in the US and Canada for those holding the O.D. degree or Ophthalmic Opticians in the UK) are medical professionals who provide primary eyecare through comprehensive eye examinations to detect and treat various visual abnormalities and eye diseases.
 Being a regulated profession, an optometrist's scope of practice may differ depending on the location.
 Thus, disorders or diseases detected outside the treatment scope of optometry are referred out to relevant medical professionals for proper care, more commonly to ophthalmologists who are physicians that specialize in tertiary medical and surgical care of the eye.
 Optometrists typically work closely together with other eye care professionals such as ophthalmologists and opticians to deliver quality and efficient eyecare to the general public.
David Dale Della Rocco (born May 4, 1952) is an American comedian and actor best known for his supporting role in the 1999 film "The Boondock Saints".
 Della Rocco is a friend of "The Boondock Saints" writer and director Troy Duffy and his role was written specifically for him, playing a character also named David Della Rocco, bringing many of his real-life mannerisms and flair to the character, as well as the character's nickname, "The Funny Man".
 He played the part of a low-level mobster who helps his two friends, the MacManus brothers, in ridding Boston of criminals and evil.
 David Della Rocco returns as "Rocco" in the sequel "" in a dream sequence guiding the MacManus brothers on their mission.
Sir David Lean, CBE (25 March 190816 April 1991) was an English film director, producer, screenwriter and editor, responsible for large-scale epics such as "The Bridge on the River Kwai" (1957), "Lawrence of Arabia" (1962) and "Doctor Zhivago" (1965).
 He also directed adaptations of Dickens novels "Great Expectations" (1946) and "Oliver Twist" (1948), as well as the romantic drama "Brief Encounter" (1945).
The Boondock Saints is a 1999 American vigilante action film written and directed by Troy Duffy.
 The film stars Sean Patrick Flanery and Norman Reedus as fraternal twins, Connor and Murphy MacManus, who become vigilantes after killing two members of the Russian Mafia in self-defense.
 After both experience an epiphany, the brothers, together with their friend "Funny Man" (David Della Rocco), set out to rid their home city of Boston, Massachusetts of crime and evil, all while being pursued by FBI Agent Paul Smecker (Willem Dafoe).
The following is a filmography of David Lean, whose body of work in the film industry spanned the period from 1930–1984.
 This list includes the release year of the film, the role(s) Lean had in the production of each film, and additional notes such as awards and nominations.
 Lean directed 17 feature films in total.
Troy Duffy (born June 8, 1971 in Hartford, Connecticut) is an American director, screenwriter, and musician.
 He has directed two films, "The Boondock Saints", and its sequel, "".
The National Association for Chiropractic Medicine (NACM) was a minority chiropractic association founded in 1984 that described itself as a "consumer advocacy association of chiropractors".
 It openly rejected some of the more controversial aspects of chiropractic, including a basic concept of chiropractic, vertebral subluxations as the cause of all diseases.
 It also sought to "reform the chiropractic profession away from a philosophical scope of practice and towards an applied science scope of practice."
 It stated that it was "dedicated to bringing the scientific based practice of chiropractic into mainstream medicine" and that its members "confine their scope of practice to scientific parameters and seek to make legitimate the utilization of professional manipulative procedures in mainstream health care delivery."
 "While the NACM is focused on furthering the profession, its primary focus is on the rights and safety of the consumers."
 The NACM was the object of much controversy and criticism from the rest of the profession.
 It quietly dropped out of sight and its demise apparently occurred sometime between May 30, 2008 and March 6, 2010.
The Sound Barrier (known in the United States, as Breaking Through the Sound Barrier and Breaking the Sound Barrier) is a British 1952 film directed by David Lean.
 It is a fictional story about attempts by aircraft designers and test pilots to break the sound barrier.
 It was David Lean's third and final film with his wife Ann Todd, but it was his first for Alexander Korda's London Films following the break-up of Cineguild.
 "The Sound Barrier" stars Ralph Richardson, Ann Todd, and Nigel Patrick.
The David Lean Cinema is a small cinema built in Croydon, London, in the 1990s, to honour the director David Lean, who was born in the town.
 It is located within the Croydon Clocktower arts complex on Katharine Street.
Oliver Twist is a 1948 British film and the second of David Lean's two film adaptations of Charles Dickens novels.
 Following the success of his 1946 version of "Great Expectations", Lean re-assembled much of the same team for his adaptation of Dickens' 1838 novel, including producers Ronald Neame and Anthony Havelock-Allan, cinematographer Guy Green, designer John Bryan and editor Jack Harris.
 Lean's then-wife, Kay Walsh, who had collaborated on the screenplay for "Great Expectations", played the role of Nancy.
 John Howard Davies was cast as Oliver, while Alec Guinness portrayed Fagin.