Macular degeneration, also known as age-related macular degeneration (AMD or ARMD), is a medical condition which results in blurred (or absent) vision in the centre of the visual field.
It's characterised by a gradual and general degeneration of the eye's photo-receptors (retina) and surrounding tissues.
It's estimated that it affects more than 6 million people worldwide - and is a leading cause of vision loss in people 50 years or older.
The causes are not known, but there may be genetic factors. Exposure to toxins etc (e.g. smoking), nutritional factors, and cardiovascular disease are also under consideration.
It is a permanent condition, and there is no current curative therapy.
For technical details see: Clinical Interventions in Aging 2017; 12:
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