{"product_id":"lea-symbols®-single-symbol-book","title":"LEA Symbols® Single Symbol Book","description":"\u003cspan class=\"c-text__label\"\u003eProduct overview\u003c\/span\u003e\n \u003cul class=\"c-text__list\"\u003e\n \u003cli\u003eWith symbols in various sizes\n\u003c\/li\u003e\n \u003cli\u003eResponse key and cover included\n\u003c\/li\u003e\n \u003cli\u003eVisual acuity: 0.10 - 2.50\n\u003c\/li\u003e\n \u003cli\u003eTest distance: 3 m\n\u003c\/li\u003e\n \u003cli\u003eDimensions: 12.7 x 12.7 cm\u003c\/li\u003e\n \u003c\/ul\u003e \u003ch4\u003eLEA Symbols® Single Symbol Book\u003c\/h4\u003e\n\n\u003cp\u003eThe LEA™ Symbols single symbol book is used \u003cb\u003eto determine the visual acuity threshold in children and adults\u003c\/b\u003e. The book with the \u003cb\u003edifferent symbols\u003c\/b\u003e - circle, square, house and apple - is held out to the patient\u003cb\u003e in different sizes\u003c\/b\u003e and at different distances.\u003c\/p\u003e\u003cbr\u003e\n\n\n\u003cp\u003eThe ring binder book is supplied \u003cb\u003ewith a response key and cover.\u003c\/b\u003e The cover can be used to hide the other symbols on a page.\u003c\/p\u003e\u003cbr\u003e\n\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eLEA™ Symbols Single Symbol Book\u003c\/li\u003e\n\u003cli\u003eDetermines the visual acuity threshold of children and adults\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eRing binder with symbols in different sizes \u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eResponse key and cover included\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003eVisual acuity: 0.10 - 2.50\u003c\/li\u003e\n\u003cli\u003eTest distance: 3 m \u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eDimensions: 12.7 x 12.7 cm\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\n\n\n\u003ch3\u003eApllication\u003c\/h3\u003e\n\n\n\u003cp\u003eThe recommended test distance for this eye test is 3 m. Initially, the patient is shown the large optotypes at a close distance. The distance is then gradually increased. \u003c\/p\u003e\u003cbr\u003e\n\n\u003cp\u003eIf the patient's attention decreases, it can be assumed that the visual resolution has reached its limit. The visual acuity threshold is reached when at least three symbols of one size have been named correctly.\u003c\/p\u003e","brand":"Orange Medical","offers":[{"title":"Default Title","offer_id":51895377002823,"sku":"142433","price":104.73,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/6301\/9079\/files\/142433-lea-einzelringbuch-symbole-1-trusetal_03df2ae4-6d4b-403a-8135-40172b84ab5e.jpg?v=1752053960","url":"https:\/\/orangemedical.co.uk\/products\/lea-symbols%c2%ae-single-symbol-book","provider":"Orange Medical","version":"1.0","type":"link"}