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A reference value above which visual acuity is considered normal is called 6/6 vision, the USC equivalent of which is 20/20 vision: At 6 metres or 20 feet, a human eye with that performance is able to separate contours that are approximately 1.75 mm apart. [9] Vision of 6/12 corresponds to lower performance, while vision of 6/3 to better ...
Snellen chart. The Snellen chart, which dates back to 1862, is also commonly used to estimate visual acuity.A Snellen score of 6/6 (20/20), indicating that an observer can resolve details as small as 1 minute of visual angle, corresponds to a LogMAR of 0 (since the base-10 logarithm of 1 is 0); a Snellen score of 6/12 (20/40), indicating an observer can resolve details as small as 2 minutes of ...
The following is a list of the world's largest publicly traded financial services companies, ordered by annual sales for the latest Fiscal Year that ended March 31, 2018 or prior (all public companies with sales of $20 billion or more are included, while privately held companies are not included).
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The underwriters have a 30-day option to purchase an additional 16.875 million common shares and $750 millio ... Free Stock Analysis Report. This article Boeing Eyes $20.7 Billion Windfall As ...
Rates for a 15-year mortgage stand at 6.13% for purchase and 6.16% for refinance, down 11 basis points from 6.24% for purchase and 9 basis points from 6.25% for refinance this time last week.
Central visual acuity of 20/200 or less in the better eye with corrective glasses or central visual acuity of more than 20/200 if there is a visual field defect in which the peripheral field is contracted to such an extent that the widest diameter of the visual field subtends an angular distance no greater than 20 degrees in the better eye.
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