{"product_id":"low-contrast-visual-acuity-book","title":"Low Contrast Visual Acuity Book","description":"\u003cp\u003eContrast varies by page: full contrast, 25% , 10%, 5%, 2.5%, 1.25%, and .6%.\u003c\/p\u003e\n\u003cp\u003eSpiral bound.\u003c\/p\u003e\n\u003cp\u003eUses different optotype combinations for each level to prevent undesired memorization.\u003c\/p\u003e\n\u003cp\u003eThis contrast sensitivity flip book includes a series of seven contrast levels for accurate and precise vision testing. This levels decrease throughout the test beginning with acuity, 25%, 10%, 5%, 2.5%, 1.25% and ending with .6%. The use of several contrast levels help to accurately record the patients contrast sensitivity. Each test book includes instructions, recording forms and a soft tip pointer for accurate, easy and quick testing. All contrast levels are calibrated for testing and provide accurate, reliable, and repeatable results. Great for clinical studies or research.\u003c\/p\u003e","brand":"Precision Vision","offers":[{"title":"Sloan","offer_id":45921483227297,"sku":"2125","price":345.0,"currency_code":"USD","in_stock":true},{"title":"PV Numbers","offer_id":45921483260065,"sku":"2725_","price":345.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0718\/4321\/7569\/files\/cef09c4dc3d0d8d265ab7ea9482b510d_XL.jpg?v=1776157146","url":"https:\/\/precision-vision.com\/products\/low-contrast-visual-acuity-book","provider":"Precision Vision","version":"1.0","type":"link"}