Category: V
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Vitreous detachment
The separation of the vitreous humour from the retina, often due to natural ageing when the vitreous humour thins, but also occurring in other conditions such as diabetes.
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Vitreous
Having the characteristics of glass. Relating to the vitreous humour of the eye. The vitreous humor is a clear gel-like substance that occupies the posterior portion of the eye.
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Vitellus
The yolk of an egg.
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Vitamin deficiency
A lack of necessary vitamins.
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Vital organs
The most important organs in the body, without which a human being cannot live, e.g. the heart, lungs and brain.
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Vital centre
A group of nerve cells in the brain which govern a particular function of the body such as the five senses. Groups of neurons, usually sited in the hypothalamus and the brain stem, that are the control centres for various essential body functions. Examples are: blood pressure, breathing, heart rate and temperature control. The centres…
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Vital
Important or necessary for life.
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Visually impaired person
A person whose eyesight is not clear.
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Visually impaired
Having difficulty in seeing because of an eye condition.
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Visualisation
A technique in which an image of an internal organ or other part of the body is produced by using X-rays or other means such as magnetic resonance imaging. A technique in which someone creates a strongly positive mental picture of something such as the way in which they would like to solve a problem,…