Category: O

  • Oculonasal

    Referring to both the eye and the nose.  

  • Oculomotor nerve

    The third cranial nerve which controls the eyeballs and eyelids. One of a pair of motor nerves, the third of cranial nerves, essential for eye movement. The third cranial nerve, which functions primarily to send impulses to the muscles of the eyes and eyelids in order to direct movement. The third cranial nerve (III), which…

  • Oculogyric

    Causing eye movements.  

  • Oculist

    A qualified physician or surgeon who specialises in the treatment of eye disorders. Obsolete term for ophthalmologist, a physician who is a specialist in diseases of the eye.  

  • Ocular dominance

    A condition in which a person uses one eye more than the other. The use of one eye by choice for particular tasks such as aiming a gun. This may or may not be related to right-hand or left-hand dominance.  

  • Ochronosis

    A condition in which cartilage, ligaments and other fibrous tissue become dark as a result of a metabolic disorder, and in which the urine turns black on exposure to air. Condition marked by the accumulation of brown-black pigment in cartilage and other connective tissue, usually due to phenol poisoning. The presence of brown-black pigment in…

  • Occurrence

    Something that takes place.  

  • Occur

    To take place. To come into a person’s mind.  

  • Occupational medicine

    The branch of medicine concerned with accidents and diseases connected with work. The branch of medicine that is concerned with the effects of a person’s job on his or her health. Occupational medicine emphasizes the prevention of work-related disease and injury and the promotion of general health in workers. It encompasses problems ranging from lung…

  • Occupational hazard

    A dangerous situation related to the working environment. Any condition of a job, such as exposure to radiation or chemicals, that can result in injury or illness.