- Occupational therapy
Occupational therapy (OT) is the use of assessment and intervention to develop, recover, or maintain the meaningful activities, or occupations, of individuals, groups, or communities. It is an allied health profession performed by occupational therapists. OTs often work with people with mental health problems, disabilities, injuries, or impairments.
- Old age
Old age consists of ages nearing or surpassing the average life span of human beings, and thus the end of the human life cycle. Euphemisms and terms for old people include, old people (worldwide usage), seniors (American usage), senior citizens (British and American usage), older adults (in the social sciences), the elderly, and elders (in many cultures including the cultures of aboriginal people).
Source: Wikipedia (http://en.wikipedia.org/wiki/Old_age)
Oncology is a branch of medicine that deals with the prevention, diagnosis, and treatment of cancer. A medical professional who practices oncology is an oncologist. The name's etymological origin is the Greek word ὄγκος (ónkos), meaning "tumor", "volume" or "mass" and the word λόγος (logos), meaning "speech".
Ophthalmology is the branch of medicine that deals with the anatomy, physiology and diseases of the eye. An ophthalmologist is a specialist in medical and surgical eye problems. Since ophthalmologists perform operations on eyes, they are both surgical and medical specialists. A multitude of diseases and conditions can be diagnosed from the eye.
Source: Wikipedia (https://en.wikipedia.org/wiki/Ophthalmology)
Orthotics (Greek: Ορθός, ortho, "to straighten" or "align") is a specialty within the medical field concerned with the design, manufacture and application of orthoses. An orthosis (plural: orthoses) is "an externally applied device used to modify the structural and functional characteristics of the neuromuscular and skeletal system". An orthotist is the primary medical clinician responsible for the prescription, manufacture and management of orthoses.
Source: Wikipedia (https://en.wikipedia.org/wiki/Orthotics)
Otorhinolaryngology (Otolaryngology) is the area of medicine that deals with disorders and conditions of the ear, nose, and throat (ENT) region, and related areas of the head and neck. Doctors who specialize in this area are called otorhinolaryngologists, otolaryngologists, ENT doctors, ENT surgeons, or head and neck surgeons. Patients seek treatment from an otorhinolaryngologist for diseases of the ear, nose, or throat and for the management of cancers of the head and neck.
Source: Wikipedia (https://en.wikipedia.org/wiki/Otorhinolaryngology)