| Readability Tool for Education
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Made by dr
Piet van der Zanden |
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| Select your Distance from Projection Screen to Last Seat |
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| Lecture Hall |
Meeting Room |
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20'
(arcminute) is based on 100% visual acuity (about the size of TV subtitling) |
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17'
is minimal discernible angle for proper reading based on 100% visual acuity |
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14'
lets you just discern the characters when proper luminance and contrast |
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1' is minimal angle to
discern any pixels or lines based on 100% visual
acuity |
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