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Glossary

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O

  • optics

    A branch of physics that deals with the properties and behaviour of both visible and invisible light. The field includes the generation, transmission, and detection or perception of light.

  • optometer

    An instrument for measuring the refractive properties of the eye

  • optometry

    The professional practice of eye and vision care. Optometry includes the correction of visual defects with lenses or glasses.

  • oral contraceptive pill

    A drug containing hormones, taken to stop pregnancy.

  • oral rehydration salts

    A cheap and effective treatment for dehydration. The salts are usually a solution of sugar and salts taken orally. They are used in the developing world to save children from death by diarrhoea.

  • orthopaedic boot

    Type of footwear for the easing or correction of club foot or other deformities of the feet.

  • orthopaedic equipment

    Relates to equipment for the treatment of physical deformities,and surgical treatment of the musculoskeletal system.

  • orthopaedic saw

    A saw used for orthopaedic surgery. Orthopaedic surgery is the branch of surgery concerned with injuries to, or conditions involving, the musculoskeletal system.

  • orthopaedic support

    A support for part of the human body such as the back or a leg

  • orthopaedics

    The branch of medicine concerned with the preservation and restoration of the muscular and skeletal systems in the body.

  • orthoptoscope

    An instrument for assessing the degree to which a person uses both eyes. It is also used to measure the angle of a squint.

  • Ottoman empire

    Former Turkish empire that controlled much of south east Europe, the Middle East and North Africa between the 14th and 20th centuries.

  • ovariotomy

    The operation of removing one or both of the ovaries

  • ovocyclin

    form of estrogen hormone. It is produced in the ovary, placenta, testis, and possibly the adrenal cortex.

  • oxytetracycline

    an antibiotic (penicillin) administered by mouth to treat infections caused by a wide variety of bacteria; Terramycin is a trade mark of Pfizer Products Inc.:oxytetracyline and derivatives thereof, and substances containing oxytetracyline or derivatives thereof, all prepared for use as antibiotics, first registered in 1954

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