{"id":543956,"date":"2021-05-20T12:40:01","date_gmt":"2021-05-20T12:40:01","guid":{"rendered":"https:\/\/www.abnewswire.com\/pressreleases\/?p=543956"},"modified":"2021-05-20T12:40:01","modified_gmt":"2021-05-20T12:40:01","slug":"the-knowledge-and-information-about-bifocal-and-progressive-lenses","status":"publish","type":"post","link":"https:\/\/www.abnewswire.com\/pressreleases\/the-knowledge-and-information-about-bifocal-and-progressive-lenses_543956.html","title":{"rendered":"Knowledge and Information About Bifocal And Progressive Lenses"},"content":{"rendered":"
\"Knowledge<\/a><\/div>\n

Bifocal<\/strong><\/span><\/p>\n

A lens<\/a> with two fields of vision separated by a line. Generally the top is designated for distance-vision or computer-distance and the bottom for near-vision work such as reading.<\/p>\n

In a Bifocal lens, the two fields of vision are specifically differentiated by a visible<\/strong> line. The bottom reading area is 28mm wide and is positioned just below the centerline of the lens. The physical position of the bi-focal area will be affected by the physical height of the lens chosen.<\/span><\/p>\n

The total lens height for a Bifocal lens must be 30mm or greater. We recommend a taller lens for more comfortable wear, but 30 mm is the minimum height for a bifocal lens. If the frame chosen has a lens height smaller than 30mm, a different frame must be chosen for Bifocal lenses.<\/span><\/p>\n

Progressive<\/strong><\/span><\/p>\n

This refers to the lens<\/a> design which includes multiple fields of vision, without lines, and is sometimes referred to as a “no-line multi-focal”. In a progressive lens, the shape of the corrected part of the lens is approximately that of a funnel or a mushroom.<\/p>\n

In a Standard Progressive, the top portion is for distance-vision, narrowing to the lower middle for intermediate-vision, finally to the bottom portion for the reading-vision. The intermediate and reading areas are expected to be smaller than the distance area. Standard Progressives are the most commonly worn progressive lenses.<\/span><\/p>\n

In a Workspace Progressive, the top portion is for intermediate vision, while the bottom portion is for near-vision or reading; there is no distance vision in a Workspace Progressive. There are 2 types of Workspace Progressives: the Mid-Range Progressive, and the Near-Range Progressive. The Mid-Range Progressive is suitable for near work that involves heavy intermediate vision such as desktop computers and meetings, while the Near-Range Progressive is best for stationary near work such as prolonged reading, hand-held device use, and crafting.<\/span><\/p>\n

The lens<\/a> height for a progressive lens must be 30mm or greater. We recommend a taller lens for more comfortable wear, but the minimum lens height is 30 mm. If this frame has a lens height smaller than 30mm, a different frame must be chosen for progressive lenses.<\/p>\n

Media Contact<\/span>
Company Name:<\/strong> Zhenjiang Kingway Optical Co., Ltd.<\/a>
Email:<\/strong> Send Email<\/a>
Phone:<\/strong> +86 13806107992
Country:<\/strong> China
Website:<\/strong> https:\/\/www.kingway-optical.com\/<\/a><\/p>\n

<\/object>\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

Bifocal A lens with two fields of vision separated by a line. Generally the top is designated for distance-vision or computer-distance and the bottom for near-vision work such as reading. In a Bifocal lens, the two fields of vision are … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[437,410,422,420],"tags":[],"class_list":["post-543956","post","type-post","status-publish","format-standard","hentry","category-Lifestyle","category-Manufacturing-Industry","category-Retail","category-Science"],"_links":{"self":[{"href":"https:\/\/www.abnewswire.com\/pressreleases\/wp-json\/wp\/v2\/posts\/543956","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.abnewswire.com\/pressreleases\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.abnewswire.com\/pressreleases\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.abnewswire.com\/pressreleases\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.abnewswire.com\/pressreleases\/wp-json\/wp\/v2\/comments?post=543956"}],"version-history":[{"count":0,"href":"https:\/\/www.abnewswire.com\/pressreleases\/wp-json\/wp\/v2\/posts\/543956\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.abnewswire.com\/pressreleases\/wp-json\/wp\/v2\/media?parent=543956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.abnewswire.com\/pressreleases\/wp-json\/wp\/v2\/categories?post=543956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.abnewswire.com\/pressreleases\/wp-json\/wp\/v2\/tags?post=543956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}