{"id":1810,"date":"2025-03-10T09:41:15","date_gmt":"2025-03-10T09:41:15","guid":{"rendered":"https:\/\/www.thataintnoplane.com\/index.php\/2025\/03\/10\/the-eyes-at-night-an-article-on-attaining-and-maintaining-night-vision\/"},"modified":"2025-03-10T09:41:15","modified_gmt":"2025-03-10T09:41:15","slug":"the-eyes-at-night-an-article-on-attaining-and-maintaining-night-vision","status":"publish","type":"post","link":"https:\/\/www.thataintnoplane.com\/index.php\/2025\/03\/10\/the-eyes-at-night-an-article-on-attaining-and-maintaining-night-vision\/","title":{"rendered":"&#8220;The Eyes at Night&#8221; an article on attaining and maintaining night vision"},"content":{"rendered":"<p><strong>The Eyes at Night: A Guide to Achieving and Sustaining Night Vision<\/strong><\/p>\n<p>While encounters with Unidentified Aerial Phenomena (UAP) can occur at any time, many enthusiasts particularly enjoy nighttime sky-watching, where both natural and artificial celestial objects abound. Most observers lack infrared or starlight night vision devices and must rely solely on their eyesight. Fortunately, they can enhance their night vision through a process known as dark adaptation, which significantly increases light sensitivity\u2014up to a million times\u2014after spending enough time in the dark.<\/p>\n<p>This post highlights a June 1942 article from the U.S. Naval Institute Proceedings that explores the intricacies of dark-adapted night vision: <a href=\"https:\/\/www.usni.org\/magazines\/proceedings\/1942\/june\/use-eyes-night\">Read the full article here<\/a>. Please note that the article utilizes the term &#8220;millimicron&#8221; to refer to wavelengths, which is equivalent to &#8220;nanometer.&#8221;<\/p>\n<p>The article delves into several key topics, including:<\/p>\n<ul>\n<li>A comparison of rod and cone cells in night vision, focusing on their sensitivity to different wavelengths.<\/li>\n<li>The illumination threshold for color discrimination (set at &#8220;1\/1,000 foot candle&#8221;).<\/li>\n<li>The biological mechanisms behind dark adaptation.<\/li>\n<li>Practical tips for achieving dark adaptation, including an evaluation of eye patches.<\/li>\n<li>The use of deep red filtered goggles or light sources (wavelengths over 600 millimicrons) to help maintain night vision, while also noting potential drawbacks like reduced peripheral vision.<\/li>\n<li>Techniques for utilizing parafoveal vision (offset gaze) and methodical scanning.<\/li>\n<li>The visibility limitations of unilluminated aerial vehicles (approximately 1,000 feet on a clear, starlit night, but only from above or below).<\/li>\n<li>Recommendations for binocular use, emphasizing the need for proper light-gathering capabilities to counteract magnification.<\/li>\n<li>Various factors influencing the body&#8217;s capacity for dark adaptation.<\/li>\n<li>A set of guidelines dubbed &#8220;The Ten Commandments of Night Vision.&#8221;<\/li>\n<\/ul>\n<p>A key takeaway from the article states: &#8220;Dark adaptation may be considered nearly complete within half an hour. At this point, the retina\u2014specifically the rod cells\u2014should be capable of detecting light as faint as 1\/1,000,000 of a foot candle, roughly equivalent to the illumination provided by a white card lit by a candle one thousand feet away.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"entry-summary\">\nThe Eyes at Night: A Guide to Achieving and Sustaining Night Vision While encounters with Unidentified Aerial Phenomena (UAP) can occur at any time, many enthusiasts particularly enjoy nighttime sky-watching, where both natural and artificial celestial objects abound. Most observers lack infrared or starlight night vision devices and must rely solely on their eyesight. Fortunately,&hellip;\n<\/div>\n<div class=\"link-more\"><a href=\"https:\/\/www.thataintnoplane.com\/index.php\/2025\/03\/10\/the-eyes-at-night-an-article-on-attaining-and-maintaining-night-vision\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &ldquo;&#8220;The Eyes at Night&#8221; an article on attaining and maintaining night vision&rdquo;<\/span>&hellip;<\/a><\/div>\n","protected":false},"author":1,"featured_media":3918,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-1810","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ufos","entry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/posts\/1810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/comments?post=1810"}],"version-history":[{"count":0,"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/posts\/1810\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/media\/3918"}],"wp:attachment":[{"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/media?parent=1810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/categories?post=1810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thataintnoplane.com\/index.php\/wp-json\/wp\/v2\/tags?post=1810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}