Macular degeneration, also known as age-related macular degeneration (AMD or ARMD), is a medical condition which results in blurred (or no 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 - as well as exposure to toxins etc (e.g. smoking), nutritional factors, cardiovascular disease.
It is a permanent condition, an there is no current curative (i.e. reversal) therapy.
For technical details see: Clinical Interventions in Aging 2017; 12: