https://www.iala.int/wiki/dictionary/index.php?action=history&feed=atom&title=Point_Vision 2026-05-03T16:39:20Z Revision history for this page on the wiki MediaWiki 1.41.5 https://www.iala.int/wiki/dictionary/index.php?title=Point_Vision&diff=9975&oldid=prev 2024-02-03T12:23:07Z

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Oferiks https://www.iala.int/wiki/dictionary/index.php?title=Point_Vision&diff=6562&oldid=prev 2009-02-25T10:00:11Z

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Oferiks https://www.iala.int/wiki/dictionary/index.php?title=Point_Vision&diff=1558&oldid=prev 2009-02-25T00:00:11Z

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Oferiks https://www.iala.int/wiki/dictionary/index.php?title=Point_Vision&diff=1557&oldid=prev 2009-02-15T12:00:00Z

<p></p> <p><b>New page</b></p><div><br /> &#039;&#039;&#039;2-1-370<br /> <br /> Point Vision (of a light source);<br /> <br /> A special mode of vision which takes place when the threshold of illuminance (2-1-390) at the eye of an observer is independent of the angular subtense of the light source.<br /> <br /> <br /> Note: For a background luminance of less than about 0.1 candela per square metre, point vision takes place when the light source has an apparent angular diameter not more than about one minute of arc. For higher values of background luminance, point vision can also take place if the angular diameter of the light source is accordingly smaller.<br /> <br /> {{IALAFooter}}<br /> <br /> {{languages|Point Vision}}<br /> [[Category:2.1 Optics and Vision]]<br /> [[Category:Alphabetical Index]]<br /> [[Category:IALA Dictionary 1970-89 Edition]]</div>

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