{"product_id":"pelli-robson-contrast-sensitivity-chart","title":"Pelli-Robson Contrast Sensitivity Chart","description":"\u003cp\u003eFeatures Traditional Sloan Optotypes\u003c\/p\u003e\n\u003cp\u003eFor use at 100cm (1m)\u003c\/p\u003e\n\u003cp\u003eIncludes two charts which may be wall or easel mounted and score sheets.\u003c\/p\u003e\n\u003cp\u003eIllumination of 85 cd\/m² is key to good results\u003c\/p\u003e\n\u003cp\u003eDesigned by DG Pelli, JG Robson and A J Wilkins, because they see contrast sensitivity as a realistic assessment of how well the patient sees large faint objects.\u003c\/p\u003e\n\u003cp\u003eThe chart follows the luminance, font, and letter spacing recommendations of the Committee on Vision of the National Academy of Sciences and National Research Council (Adv. Ophthal 41, 103-148, 1980).\u003c\/p\u003e\n\u003cp\u003eThe letter sequences are organized into groups of three (triplets) with two triplets per line. Within each triplet, all letters have the same contrast. The contrast decreases from one triplet to the next, even within one line.\u003c\/p\u003e\n\u003cp\u003eThe testing of contrast sensitivity on a regular basis is key to detecting early signs of diseases such as Parkinson's, Glaucoma, and Cataracts. By testing with several different contrast levels configured together, the patient's contrast sensitivity level is better assessed and records will be more precise.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/products\/easel-for-pelli-robson-charts\/\"\u003eEasel Available\u003c\/a\u003e For Display alternative to wall mounting.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/storage.googleapis.com\/stateless-precision-vision\/2021\/10\/b2f0f8ad-pelli-robson-instructions.pdf\"\u003eDownload Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eDownload Recording Forms for:  \u003ca href=\"https:\/\/storage.googleapis.com\/stateless-precision-vision\/2021\/10\/e7eccad9-5014-chart-1-and-2-recording-form.pdf\"\u003e5014\u003c\/a\u003e  -  \u003ca href=\"https:\/\/storage.googleapis.com\/stateless-precision-vision\/2021\/10\/d9396917-5014-3-recording-form-rev2.pdf\"\u003e5014-3\u003c\/a\u003e  - \u003ca href=\"https:\/\/storage.googleapis.com\/stateless-precision-vision\/2021\/10\/c90c0ad9-5014-4-recording-form-rev2-approved.pdf\"\u003e5014-4\u003c\/a\u003e\u003c\/p\u003e","brand":"Pelli-Robson","offers":[{"title":"Set 1","offer_id":45921486766241,"sku":"5014","price":598.75,"currency_code":"USD","in_stock":true},{"title":"Chart 1","offer_id":45921486799009,"sku":"5014-1","price":327.25,"currency_code":"USD","in_stock":true},{"title":"Chart 2","offer_id":45921486831777,"sku":"5014-2","price":327.25,"currency_code":"USD","in_stock":true},{"title":"Chart 3","offer_id":45921486864545,"sku":"5014-3","price":327.25,"currency_code":"USD","in_stock":true},{"title":"Chart 4","offer_id":45921486897313,"sku":"5014-4","price":327.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0718\/4321\/7569\/files\/5014_1-scaled-1.jpg?v=1776157164","url":"https:\/\/precision-vision.com\/products\/pelli-robson-contrast-sensitivity-chart","provider":"Precision Vision","version":"1.0","type":"link"}