[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-296263-105":59,"doc-detail-296263-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","snellen-eye-chart-directions-for-use-296263","Snellen Eye Chart - Directions for Use","","Snellen eye chart instructions explain how at-home testing can assess the clarity of distance vision. The chart supports screening children for nearsightedness and helps determine whether a person meets legal visual acuity requirements for a driver’s license in many states (commonly 20/40). Directions cover setting the chart at 10 feet, covering one eye, reading aloud successively smaller lines without squinting, and recording accuracy by the percentage of correctly identified letters. It also clarifies that eye charts measure visual acuity only and cannot diagnose eye health issues like glaucoma or early diabetic retinopathy; a comprehensive exam by a licensed professional is needed.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/snellen-eye-chart-directions-for-use-296263/296263/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/snellen-eye-chart-directions-for-use-296263/296263.png","ImageObject",300,407,{"name":92,"@type":93},"Theodora","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-09-18",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",14,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"How far should the Snellen eye chart be placed for testing?","Question",{"text":113,"@type":114},"Place the chart on a wall or easel 10 feet away.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What should you do if you fail to correctly identify letters on a line?",{"text":118,"@type":114},"Stop when you fail to correctly identify at least 50 percent of the letters on a line, then switch to the other eye and repeat.",{"name":120,"@type":111,"acceptedAnswer":121},"Does a Snellen eye chart diagnose overall eye health?",{"text":122,"@type":114},"No. It measures visual acuity only and cannot detect serious conditions such as glaucoma or early diabetic retinopathy. A comprehensive exam by a licensed optometrist or ophthalmologist is needed.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},296263,1790082855,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":24},687197207919,"https://ap-avatar.wpscdn.com/avatar/a000253d6f5f7c60be?x-image-process=image/resize,m_fixed,w_180,h_180&k=1779446848396160552","Snellen Eye Chart  \nHome use of this Snellen eye chart will help you determine the clarity of your distance vision. This can be useful to screen children for nearsightedness, which causes blurry distance vision. The chart also can help you determine if you meet the legal visual acuity requirement for a valid driver’s license (20/40 in most states) .  \nDIRECTIONS FOR USE  \nFor the best accuracy (and to prevent memorization), have someone assist you when testing your vision with this eye chart. If you use eyeglasses or contact lenses for driving or other distance vision tasks, wear them during the test.  \n1. Place the chart on a wall or easel 10 feet away.  \n2. Cover one eye with your hand, a large spoon or some other item that completely blocks the vision of the covered H\\H􀀑 􀀋'R QRW DSSO\\ SUHVVXUH WR WKH FRYHUHG H\\H􀀏 DV LW PLJKW D΍HFW WKDW H\\HȇV YLVLRQ ZKHQ \\RX WHVW LW􀀑􀀌  \n3. Identify a line on the chart you can comfortably read. Read the letters on that line aloud. Have your assistant stand near the chart and record your accuracy.  \n4. Continue trying to read the letters on each successively smaller line. Do not squint.  \n5. Have your assistant stop you when you fail to correctly identify at least 50 percent of the letters on a line.  \n6. Switch to the other eye and repeat.  \n5HFRUG \\RXU YLVXDO DFXLW\\ IRU HDFK H\\H E\\ QRWLQJ WKH OLQH IRU ZKLFK \\RX FRUUHFWO\\ LGHQWLȴHG HLWKHU􀀝  \na) More than half the letters on that line, but not all of them.  \nb) All letters on that line, plus a few letters (less than half) on the next line.  \n([DPSOHV􀀝  \nΖI \\RX FRUUHFWO\\ LGHQWLI\\ ȴYH RI WKH VHYHQ OHWWHUV RQ WKH 􀀕􀀓􀀒􀀖􀀕 OLQH􀀏 \\RXU YLVXDO DFXLW\\ IRU WKDW H\\H LV􀀝 􀀕􀀓􀀒􀀖􀀕–2/7  \nIf you correctly identify all seven letters on the 20/32 line and three of the eight letters on the 20/25 line, your visual DFXLW\\ LQ WKDW H\\H LV􀀝 􀀕􀀓􀀒􀀖􀀕+3/8  \n'Ζ6&/$Ζ0(5􀀝  \nEye charts measure only visual acuity, which is just one component of good vision. They cannot determine if your eyes are \"working overtime\" (needing to focus more than normal, which can lead to headaches and eye strain) or can they determine if your eyes work properly as a team for clear, comfortable binocular vision and accurate depth perception.  \nEye charts also cannot detect serious eye problems such as glaucoma or early diabetic retinopathy that could lead to serious vision impairment and even blindness.  \nOnly a comprehensive eye exam performed by a licensed optometrist or ophthalmologist can determine if your eyes are healthy and you are seeing as clearly and comfortably as possible.  \n7R ȴQG DQ H\\H GRFWRU QHDU \\RX􀀏 YLVLW DOODERXWYLVLRQ􀀑FRP􀀒ORFDWRU  \nPlace chart 10 feet away  \n20/200  \n20/100  \n20/80  \n20/63  \n20/50  \n20/40  \n20/32  \n20/25  \n20/20  \n7R ȴQG DQ H\\H GRFWRU QHDU \\RX􀀏 YLVLW DOODERXWYLVLRQ􀀑FRP􀀒ORFDWRU  \n1  \n2  \n3  \n4  \n5  \n6  \n7  \n8  \n9","cbCaip63d00YugeA","https://ap.wps.com/l/cbCaip63d00YugeA","pdf",116103,"English","# Directions for Use\n## Testing procedure\n## Recording visual acuity\n## Limitations and next steps","[{\"question\":\"How far should the Snellen eye chart be placed for testing?\",\"answer\":\"Place the chart on a wall or easel 10 feet away.\"},{\"question\":\"What should you do if you fail to correctly identify letters on a line?\",\"answer\":\"Stop when you fail to correctly identify at least 50 percent of the letters on a line, then switch to the other eye and repeat.\"},{\"question\":\"Does a Snellen eye chart diagnose overall eye health?\",\"answer\":\"No. It measures visual acuity only and cannot detect serious conditions such as glaucoma or early diabetic retinopathy. A comprehensive exam by a licensed optometrist or ophthalmologist is needed.\"}]","Snellen Eye Chart - Directions for Use | PDF",1789730161]