{"product_id":"tumbling-e-low-contrast-flip-book","title":"Tumbling “E” Low Contrast Flip Book","description":"\u003cdiv class=\"ewa-rteLine\"\u003eNotations in M letter sizes ranging from 20M to 1.6M for testing at various distances.\n\nEach page its own contrast level at 100%, 2.5% and 1.25%.\n\nThis flip book is great for vision studies and research worldwide.\n\nThe Tumbling “E” vision chart uses only one optotype for testing.\n\nPatients not familiar with the Roman alphabet simply must gesture or sign which direction they see the “E” facing.\n\nThis is a helpful test for patients that are illiterate or mute, also.\n\nThis Tumbling “E” flip book contains three contrast levels for accurate sensitivity screening.\n\n\n\n\n\n\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53796971217239,"sku":"SV-SDT-238-0","price":319.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SDT-238-0.jpg?v=1781603758","url":"https:\/\/www.sussex-vision.co.uk\/products\/tumbling-e-low-contrast-flip-book","provider":"ESP\/SV","version":"1.0","type":"link"}