| http://www.w3.org/ns/prov#value | - It takes into account factors such as age, gender and ethnicity, and builds up a picture of the numbers of people who are living with significant sight loss in the UK. This picture not only includes people who are registered, but also those who are waiting for treatment, those whose sight could be improved, those who have not registered for whatever reason and people whose sight loss is not at a l
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