![2020 vision chart 2020 vision chart](https://i.pinimg.com/originals/4b/a9/0d/4ba90d5f6b149ae385b38af97105a65c.jpg)
Read the full article: “Countries Facing the Highest Number of Ecological Threats are Among the World’s Least Peaceful Countries”. If you don’t wear glasses or contacts, your eye doctor will use the results to find out whether you need them. A specialized eye chart can also give you more precise results between 20/100 and 20/200. To clarify this further, if you have 20/40 vision, and there is a normal person standing 40 feet from the chart and you are standing 20 feet from the chart, you both see the same amount of detail on the eye chart. The chart measures your visual acuity, or sharpness of vision. Most optometrists and ophthalmologists use whats. The lack of resilience in countries covered in the ETR will lead to worsening food insecurity and competition over resources, increasing civil unrest and mass displacement, exposing developed countries to increased influxes of refugees. So if you have 20/40 vision, this means that you can see only as good as a normal person can see at 40 feet away from an eye chart. Eye care professionals traditionally test for 20/20 vision by having you look at letters on an eye chart. This number usually does not change, unless you are using a different eye chart and test distance. The 19 countries with the highest number of ecological threats are among the world’s 40 least peaceful countries including Afghanistan, Syria, Iraq, Chad, India and Pakistan.īy 2040, a total of 5.4 billion people – more than half of the world’s projected population – will live in the 59 countries experiencing high or extreme water stress, including India and China.įive billion people could suffer from food insecurity by 2050 which is an increase of 1.5 billion people from today. In this case, the first 20 refers to a test distance of 20 feet. Over one billion people live in 31 countries where the country’s resilience is unlikely to sufficiently withstand the impact of ecological events by 2050, contributing to mass population displacement.