Assertion: ability | /r/CapableOf | correspond about 290–350 pixels per inch
Facets:
value: to 60 ppd
type: OTHER
value: for a display on a device
type: PURPOSE
Source sentences:
text: 6/6 vision is defined as the ability to resolve two points of light separated by a visual angle of one minute of arc, corresponding to 60 PPD, or about 290–350 pixels per inch for a display on a device held 250 to 300 mm from the eye.