• Understand some of the causes of visual impairment (both in the UK & globally)

globally the main cause of SSI is cataract

in the UK the main cause of SSI is Age-related macular degeneration

SSI = Severe sight impairment

• Understand why there are differences in the ophthalmic disease burden between high, middle and low-income countries and between adults and children.

because of the inverse care law

people who most need health care most are least likely to receive it.

this is due to the fact that the distribution of doctors related to the healthcare need is usually inversed compared to the population that need it eg there are 10 eye needs in Europe and 20 eye doctors but in Africa there are 20 eye needs and 2 eye doctors

catarcat = SSI cause in low income/worldwide