9mm
The GCF of 30 and 20 is 10. Chart it however you wish.
You can't convert font size to logMAR. The size of font would depend on what size screen the chart is to be shown or which printer it would be printed on and what dpi the screen or printer is.A logMAR eye test chart should be in the standard SLOAN font, you can download it from the internet. The letters in the top line of the chart should measure 44mm in height and have a letter spacing of 200% for a chart to be read at a distance of 3 meters. This line will correspond to the 20/200 or 6/60 line of the eye test chart. You can then work out all the other lines as follows:FootMetreDecimalLogMARSize@3m20/2006/600.101.0044.00mm20/1606/480.1250.9035.20mm20/1256/380.160.8027.50mm20/1006/300.200.7022.00mm20/806/240.250.6017.60mm20/636/190.320.5013.90mm20/506/150.400.4011.00mm20/406/120.500.308.80mm20/326/9.50.630.207.00mm20/256/7.50.800.105.50mm20/206/6.01.000.004.40mm20/166/4.81.25−0.103.52mm20/12.56/3.81.60−0.202.75mm20/106/3.02.00−0.302.20mm
the font should be size 20 text regular.
20:20 vision
Celina Font was born on June 20, 1970, in Buenos Aires, Argentina.
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A person with 20/20 vision can read an eye chart at a distance of 20 feet. A person with 20/40 vision can't and has to get closer to the eye chart. A person with 20/20 vision can read at 40 feet what a person with 20/40 visionAnswerIf you have 20/40 vision, it means that when you stand 20 feet away from the chart you can see what a normal human can see when standing 40 feet from the chart. That is, if there is a normal person standing 40 feet away from the chart and you are standing only 20 feet away from it, you and the normal person can see the same detail. 20/100 means that when you stand 20 feet from the chart you can see what a normal person standing 100 feet away can see. 20/200 is the cutoff for legal blindness in the United States.
8.73 mm
"Pearls Before Swine" comic strip is typically written in the font Comic Sans.
20 out of hundred
40 picas