provide estimatesSince 2008, the group have compiled a database of over 250 population-based eye surveys published between 1980 and 2012, by means of searching tens of thousands of vision-related references in the medical literature (‘systematic review’). This database also includes unpublished ‘gray’ literature, such as PhD theses and government reports. Prevalence of various severities of blindness and vision impairment are extracted from these sources and disaggregated by age and sex insofar as the detail allows within the published sources.
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However, for many studies, direct communication with study investigators by members of our group has allowed more detailed disaggregation of the data, for example to narrower age-range categories.
The group provided an early form of the database (1980-2010) to the Global Burden of Disease Study, to which the GBD Core Group assigned disability weights. This resulted in a series of outputs on YLDs and DALYs published in The Lancet in 2012.
Subsequently the group added more recent data from studies up to 2012 and independently published several key papers on the prevalence of vision loss by cause.
The database has recently been updated with new data to 2014, with new estimates planned for release in 2015.
The group provided an early form of the database (1980-2010) to the Global Burden of Disease Study, to which the GBD Core Group assigned disability weights. This resulted in a series of outputs on YLDs and DALYs published in The Lancet in 2012.
Subsequently the group added more recent data from studies up to 2012 and independently published several key papers on the prevalence of vision loss by cause.
The database has recently been updated with new data to 2014, with new estimates planned for release in 2015.