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2. Number of individuals affected with vision loss in the United Kingdom from 1990 to 2020, by severity [https://www.statista.com/statistics/1200836/vision-impairments-in-the-uk/]
3. Blindness and vision loss [https://www.nhs.uk/conditions/vision-loss/]
4. Diabetes and blindness [https://www.diabetes.co.uk/diabetes-complications/diabetes-and-blindness.html]
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