{"product_id":"pv-numbers-series-etdrs","title":"PV Numbers Series ETDRS®","description":"\u003cp\u003eThe PV Numbers Series ETDRS® chart family — Chart 1, Chart 2, Chart 3, or the full Set of 3 — using the PV Numbers (1, 2, 3, 5, 6, 7, 9) optotype set across the four standard ETDRS testing distances (2 m, 2.5 m, 3 m, 4 m).\u003c\/p\u003e\n\u003cp\u003ePV Numbers were developed to give numerically-literate patients a reliable Snellen-equivalent test that works across language barriers and avoids ambiguous letter optotypes. Use Charts 1, 2, and 3 in rotation as alternate-form charts to eliminate learning effects across repeat visits.\u003c\/p\u003e\n\u003cp\u003eDesigned to fit the 2425 \/ 2425 LED Large ETDRS® Illuminator Cabinets. A scrambled-form variant of Chart 1 is available as a separate product for advanced repeat-measurement protocols.\u003c\/p\u003e","brand":"ETDRS®, Precision Vision","offers":[{"title":"Chart 1 \/ 2 m \/ 6.5 ft","offer_id":45921501315233,"sku":"2723","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 1 \/ 2.5 m \/ 8.3 ft","offer_id":45921501348001,"sku":"2722","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 1 \/ 3 m \/ 10 ft","offer_id":45921501380769,"sku":"2714","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 1 \/ 4 m \/ 13 ft","offer_id":45921501413537,"sku":"2750","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 2 \/ 2 m \/ 6.5 ft","offer_id":46434367275169,"sku":"2723A","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 2 \/ 2.5 m \/ 8.3 ft","offer_id":46434367307937,"sku":"2722A","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 2 \/ 3 m \/ 10 ft","offer_id":46434367340705,"sku":"2714A","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 2 \/ 4 m \/ 13 ft","offer_id":46434367373473,"sku":"2750A","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 3 \/ 2 m \/ 6.5 ft","offer_id":46434367406241,"sku":"2723B","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 3 \/ 2.5 m \/ 8.3 ft","offer_id":46434367439009,"sku":"2722B","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 3 \/ 3 m \/ 10 ft","offer_id":46434367471777,"sku":"2714B","price":69.75,"currency_code":"USD","in_stock":true},{"title":"Chart 3 \/ 4 m \/ 13 ft","offer_id":46434367504545,"sku":"2750B","price":69.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0718\/4321\/7569\/files\/2750_Web.jpg?v=1776157199","url":"https:\/\/precision-vision.com\/products\/pv-numbers-series-etdrs","provider":"Precision Vision","version":"1.0","type":"link"}