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510(k) | pre‑marketing process under section 510(k) of the US Federal Food, Drug and Cosmetic Act whereby manufacturers notify the FDA of their intent to market a medical device
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age‑related macular degeneration or AMD | eye disease that progressively destroys the macula; AMD is the leading cause of severe vision loss in people over 50 in the Western world
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angiographic | diagnostic test in which dye is injected and an image created to determine the blood flow in an area
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binocular indirect ophthalmoscope or BIO | an instrument designed to visualise the interior of the eye, with the instrument at arm’s length from the subject’s eye and the observer viewing an inverted image through a convex lens located between patient and instrument
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CE | Conformité Européene, a product marking applying to products regulated by the European Commission’s health, safety and environmental protection legislation, which indicates that a manufacturer has conformed with all the obligations required and is allowed to freely distribute the product
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choroid | a collection of blood vessels in the rear of the eye which feed the retinal sensory layer with nutrients and oxygen
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diabetes | a chronic health condition where the body is unable to produce insulin and break down glucose in the blood
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diabetic retinopathy | a consequence of unmanaged blood sugar levels in a person with diabetes whereby the retinal blood vessels are damaged causing destruction of the retina itself
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direct ophthalmoscope | an ophthalmoscope that produces an upright, or unreversed, image of approximately 15 times magnification
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ellipsoidal mirror | a reflecting surface formed to the shape of a concave three dimensional ellipse that has the property of two focal points
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FDA | US Food and Drug Administration
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fluorescein angiography | a procedure allowing the blood vessels at the back of the eye to be photographed as a fluorescent dye is injected into the patient’s bloodstream
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fundus | the interior posterior surface of the eyeball which includes the retina and the macula
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fundus camera | conventional device derived from practitioner photography that is used to photograph small areas of the fundus
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glaucoma | disorder of the eye, characterised by increased pressure within the eyeball, resulting in damage to the optic nerve and retinal nerve fibres with resulting loss of vision
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macula | highly sensitive part of the retina responsible for detailed central vision
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ophthalmologist | a medically qualified specialist of eye surgery and pathology
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ophthalmoscope | an instrument for examining the interior structure of the eye, especially the retina
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optician | a professional in respect of which these are two variants: dispensing optician – a provider of glasses and contact lenses; ophthalmic optician – a person qualified to perform eye examinations and prescribe eye wear
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optometrist | a primary level eye care provider who performs eye examinations and prescribes eye wear
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Panoramic200 | the Panoramic200 Scanning Laser Ophthalmoscope supplied by Optos that delivers the optomap® Retinal Examination
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pathology | the manifestations of disease
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posterior pole | the rear hemisphere from the central vertical equator of the eye
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primary level care | the point in the health care system that is responsible for the detection of health problems
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retina | light sensitive nerve tissue in the eye that coverts light into electrical impulses for transmission to the brain via the retinal nerve fibre layer and the optic nerve
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retinal detachment | separation of the retina from its attachments to the back of the eyeball
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scanning laser ophthalmoscopes | a device that uses reflected laser light scanned into the eye analyse the retina
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secondary level care | that part of the health care system that diagnoses health problems and is often (but not always) concerned with defining treatment plans
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single image capture | a term used by Optos to discriminate a single retinal image (optomap) from a sequence of retinal images used for instance in fluorescein angiography (optomap® fa)
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slit lamp biomiscroscope | an instrument that combines a microscope with special lights that allows a practitioner to view the front of the eye and the retina (with the additional lens)
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SLO | scanning laser ophthalmoscope
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virtual point scan | a term used by the company to define the effect created by the patented system that gives rise to wide field of view created by the Panoramic200 instrument – it conveys the effect of being equivalent to positioning a scanning system inside the patient’s eye
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vitreous humour | the clear, gel‑like substance that fills the eyeball behind the lens |
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