--- title: Never look into a fiber cable! | daily.dev description: A brief safety reminder about fiber optic cable handling: never look directly into a fiber cable because the laser light used for transmission is invisible to... canonical: https://daily.dev/posts/never-look-into-a-fiber-cable--cn9ufyjxn twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Never look into a fiber cable! | daily.dev og:description: A brief safety reminder about fiber optic cable handling: never look directly into a fiber cable because the laser light used for transmission is invisible to... og:url: https://daily.dev/posts/never-look-into-a-fiber-cable--cn9ufyjxn og:image: https://api.daily.dev/og/posts/CN9ufyJxN.png og:image:alt: Never look into a fiber cable! og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Never look into a fiber cable! **[David Bombal](https://daily.dev/sources/davidbombal)** · 1 min read · 1 upvotes · 0 comments ## Summary A brief safety reminder about fiber optic cable handling: never look directly into a fiber cable because the laser light used for transmission is invisible to the human eye yet can cause permanent eye damage. High-powered lasers can cause lasting visual impairment. Additional tip: keep hands clean when working with fiber optics, as grease and dirt degrade signal performance. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Ethernet will tolerate your mistakes, but fiber optic cabling absolutely won't](https://daily.dev/posts/ethernet-will-tolerate-your-mistakes-but-fiber-optic-cabling-absolutely-won-t-jcf88hh2c) · XDA Developers · 0 upvotes · 0 comments - [The Walls Don’t Have Ears, But Fiber Optic Does](https://daily.dev/posts/the-walls-don-t-have-ears-but-fiber-optic-does-qyvgz3t65) · Hackaday · 1 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/never-look-into-a-fiber-cable--cn9ufyjxn) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Never look into a fiber cable!","url":"https://daily.dev/posts/never-look-into-a-fiber-cable--cn9ufyjxn","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/never-look-into-a-fiber-cable--cn9ufyjxn"},"datePublished":"2026-06-18T20:00:29.780Z","dateModified":"2026-06-18T20:00:43.283Z","description":"A brief safety reminder about fiber optic cable handling: never look directly into a fiber cable because the laser light used for transmission is invisible to...","image":"https://i.ytimg.com/vi/0LmFqZRHgGQ/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/0LmFqZRHgGQ/sddefault.jpg","isAccessibleForFree":true,"articleSection":"David Bombal","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"David Bombal","logo":"https://media.daily.dev/image/upload/s--Dz6oUxSb--/f_auto/v1710503980/logos/davidbombal","url":"https://daily.dev/sources/davidbombal"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/never-look-into-a-fiber-cable--cn9ufyjxn","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"","timeRequired":"PT1M","video":{"@type":"VideoObject","name":"Never look into a fiber cable!","description":"A brief safety reminder about fiber optic cable handling: never look directly into a fiber cable because the laser light used for transmission is invisible to...","thumbnailUrl":"https://i.ytimg.com/vi/0LmFqZRHgGQ/sddefault.jpg","uploadDate":"2026-06-18T20:00:29.780Z","duration":"PT1M","url":"https://api.daily.dev/r/CN9ufyJxN","embedUrl":"https://www.youtube.com/embed/0LmFqZRHgGQ"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"David Bombal","item":"https://daily.dev/sources/davidbombal"},{"@type":"ListItem","position":3,"name":"Never look into a fiber cable!"}]} ```