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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 ...
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In the term "20/20 vision" the numerator refers to the distance in feet from which a person can reliably distinguish a pair of objects. The denominator is the distance from which an 'average' person would be able to distinguish —the distance at which their separation angle is 1 arc minute .
The largest letter on an eye chart often represents an acuity of 6/60 (20/200), the value that is considered "legally blind" in the US. Many individuals with high myopia cannot read the large E without glasses, but can read the 6/6 (20/20) line or 6/4.5 (20/15) line with glasses. By contrast, legally blind individuals have a visual acuity of 6/ ...
Police and many male bystanders responded with violence against the women, securing the protest's nickname as "Black Friday." There have also been more lighthearted uses of the term, including the ...
While many theories have circulated about the origin of Black Friday's name, including a popular one that it is the day stores earn a profit or go "into the black" after a loss throughout the year ...
Contoura Vision is the only technology where consistent success beyond 20/20 vision has been achieved in the majority of patients. More than 40% of the patients that were evaluated were able to read one line on the visual acuity chart more than a person with 20/20 vision, and 13.5% could read two additional lines. [citation needed]
Professionals who work in this field are called Vision Rehabilitation Therapists [20] (VRTs) or Rehabilitation Teachers [20] (RTs). A vision rehabilitation therapist, VRT, is a professional who provides specialized instruction and guidance to individuals who are blind or have low vision. Best practice recommends professionals who work in this ...