{"product_id":"berkeley-discs-contrast-sensitivity-test","title":"Berkeley Discs Contrast Sensitivity Test","description":"\u003cp\u003e\u003c!-- wp:paragraph --\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned by Dr. Ian Bailey of the University of California, Berkeley, School of Optometry. This test of contrast sensitivity has three double-sided cards. On each of the six sides, there is a 6-cell grid of 80 mm squares. On each of the sides, three of the 6 cells contain large (50mm) discs of different contrasts.\u003c\/p\u003e\n\u003cp\u003e\u003c!-- \/wp:paragraph --\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c!-- wp:paragraph --\u003e\u003c\/p\u003e\n\u003cp id=\"video\"\u003eEach Card contains 6 Discs of varying individual contrast levels. The contrast sensitivity values are expressed in log units of contrast sensitivity using the Weber contrast ratio. See instructions below for further details.\u003c\/p\u003e\n\u003cp\u003e\u003c!-- \/wp:paragraph --\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c!-- wp:video {\"id\":82257,\"tracks\":\u003c\u003e} --\u003e\u003c\/p\u003e\n\u003cfigure class=\"wp-block-video\"\u003e\u003cvideo src=\"https:\/\/storage.googleapis.com\/stateless-precision-vision\/2021\/05\/52bf0a41-behind-the-test-berkeley-disc-test-landscape.mp4\" autoplay=\"autoplay\" muted=\"\" controls=\"controls\" width=\"100%\" height=\"100%\"\u003e\u003c\/video\u003e\u003c\/figure\u003e\n\u003cp\u003e\u003c!-- \/wp:video --\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c!-- wp:paragraph --\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c!-- \/wp:paragraph --\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c!-- wp:columns --\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c!-- \/wp:columns --\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c!-- wp:paragraph --\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0718\/4321\/7569\/files\/0123c720-8001-berkeley-discs-instructions-2019-rev1.pdf?v=1776950815\"\u003eInstructions for the Berkeley Contrast Sensitivity Test\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c!-- \/wp:paragraph --\u003e\u003c\/p\u003e","brand":"Precision Vision","offers":[{"title":"Default Title","offer_id":45921513373857,"sku":"8001","price":345.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0718\/4321\/7569\/files\/8b9743d7-8001-side-1_fannedout_web_image-scaled-1.jpg?v=1776157247","url":"https:\/\/precision-vision.com\/products\/berkeley-discs-contrast-sensitivity-test","provider":"Precision Vision","version":"1.0","type":"link"}