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==significance==
*eye health is related to every factor of total 17 SDGs both directly and indirectly
*vision impairment significantly increases mortality
==definition==
*○/● ○=distance in meter ●=designated scale
**Japanese decimal visual acuity can be converted by just calculation of the fraction
*[https://www.peekvision.org/en_GB/peek-solutions/peek-acuity/ Peek Vision App (only for Android)]
*normal > 6/6
*visual impairment 6/12 - 3/60
*blind <3/60
==magnitude==
*1.1 bil. some vision impairment in 2020
**43 mil. blind
**295 mil. MSVI (moderate to severe visual impairment)
**258 mil. mild impairment
**510 mil. near impairment
*90% of visually impaired people live in LMICs
*Women are more suffered from visual impairment than men
**because of a bit longer longevity of women as well as higher neglect from medical service than men
===economy of vision===
*global annual productivity loss is estimated as 411 bil. USD purchasing power parity (購買力平価)
==causes==
#cataract
#uncorrected refractive error (myopia and so on)
#glaucoma
#age-related macula degeneration
#corneal opacity
#diabetic retinopathy
#trachoma (''Chlamydia trachomatis'')
==control==
*VISION BEYOND 2020
*to deliver integrated people-centered eye care
==link==
*[https://globaleyehealthcommission.org/ The Lancet Global Health Commission on Global Eye Health]
*[https://iceh.lshtm.ac.uk/ International Centre for Eye Health]
