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According to the WHO (World Health Organization) the main causes of vision impairment are:

age-related macular degeneration


diabetic retinopathy


uncorrected refractive errors

It is also interesting to observe how there are differences among countries.

In fact, cataract is more common in low- and middle-income countries. In high-income countries, diseases such as glaucoma and age-related macular degeneration are more typical.…/blindness-and-visual-impairment

Specifically, we have focused on Greece, Croatia and Italy.