{"product_id":"low-vision-mixed-contrast","title":"Low Vision, Mixed Contrast","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0718\/4321\/7569\/files\/156312e3-4061mixedcontrast-scaled.jpg?v=1777638451\" alt=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch1 class=\"product_title entry-title\"\u003eMixed Contrast Reading Card – In Multiple Languages\u003c\/h1\u003e\n\u003cp\u003eDesigned as a simple screen test. The usual question for a reading test is: What is the smallest (black) line you can read? On the contrast card, one adds the question What is the smallest (grey) line you can read? The difference between the two measurements will be obvious and can simply be expressed in lines. Preliminary findings indicate a 2 or 3 line difference is normal.\u003c\/p\u003e\n\u003cp\u003eUnrelated simple sentences at 4th grade level.\u003c\/p\u003e\n\u003cp\u003eServes as an educational tool to demonstrate the effect of contrast deficits to patients and family members.\u003c\/p\u003e\n\u003cp\u003eAlso Available in Spanish, Portuguese, German, Dutch , Finnish , Swedish , Italian, French, and Danish.\u003c\/p\u003e\n\u003cp\u003eNot time-consuming (avg. read time: 45 sec.).\u003c\/p\u003e\n\u003cp\u003eUnrelated simple sentences at 4th grade level.\u003c\/p\u003e\n\u003cp\u003eServes as an educational toll to demonstrate the effect on contrast deficits to patients and family members.\u003c\/p\u003e\n\u003cp\u003eNear vision test features the mixture of acuity testing and 10% contrast sensitivity testing in one chart. Patients are tested for each simultaneously in a continuous text format. This format uses simple calibrated sentences which makes testing easy and quick. This near point continuous text chart is also available in multiple languages including English, Spanish, German, French, Portuguese, Finnish, Swedish, Italian, and Greek.\u003c\/p\u003e\n\u003cp\u003eNotations for commonly recommended testing standard of 40 cm (16 in.).\u003c\/p\u003e\n\u003cp\u003eEnglish reading card with sentences of equal length and difficulty.\u003c\/p\u003e\n\u003cp\u003eLetter sizes from 10M to 0.6M in Times Roman Font.\u003c\/p\u003e\n\u003cp\u003eAlso Available in Spanish, Portuguese, German, Dutch , Finnish , Swedish , Italian, French, and Greek.\u003c\/p\u003e\n\u003cp\u003eContinuous text cards simulate everyday tasks and activities that patients may encounter, such as reading the newspaper. This is important because it is the main part of everyday vision. Also, by testing with continuous text, doctors can establish a basis for prescriptions of magnification for corrective lenses. If everyday vision tasks are made easier, in turn the patient’s life can be easier.\u003c\/p\u003e\n\u003cp\u003eLAYOUT\u003cbr\u003eThe card contains proportionally spaced reading segments in LogMAR on two sides. Side one increments ranging in size from 10m to 3m in Times Roman font. Side two features two charts From 4m to 0.6m, two sets are provided to avoid memorization. Each line contains the same number of letters and spaces. A diopter ruler is included.\u003c\/p\u003e\n\u003cp\u003eREADING ACUITY\u003cbr\u003eAny patient who can read even one segment at any distance deserves a low vision evaluation.\u003c\/p\u003e\n\u003cp\u003eUse of the diopter ruler allows a quick check of the reading distance against the reading add. It also allows verifying the reading acuity, using the modified Snellen formula: 1\/V = M x D (M = letter size in M-units, D = viewing distance in diopters.) Examples: at 40 cm (2.5D) the 10m text represents 1\/25 (20\/500, 0.04), since 10m x 2.5D = 25. At 20cm (5D) 10m represents 1\/50 (20\/1000, 0.02), since 10m x 5D = 50. At 40cm (2.5D) the smallest print (0.06) represents 1\/16 (20\/32, 0.32), since 0.6m x 2.5D = 1.6.\u003c\/p\u003e\n\u003cp\u003eREADING FLUENCY\u003cbr\u003eSince all lines have the same length, reading performance can be timed to determine the level of magnification that will give optimum performance.\u003c\/p\u003e","brand":"Colenbrander, Precision Vision","offers":[{"title":"English \/ Eye Chart","offer_id":45921510588577,"sku":"4061","price":89.75,"currency_code":"USD","in_stock":true},{"title":"Danish \/ Eye Chart","offer_id":45921510621345,"sku":"4065-15","price":74.75,"currency_code":"USD","in_stock":true},{"title":"Spanish \/ Eye Chart","offer_id":45921510654113,"sku":"4062","price":89.75,"currency_code":"USD","in_stock":true},{"title":"Portuguese \/ Eye Chart","offer_id":45921510686881,"sku":"4063","price":90.0,"currency_code":"USD","in_stock":true},{"title":"German \/ Eye Chart","offer_id":45921510719649,"sku":"4064","price":90.0,"currency_code":"USD","in_stock":true},{"title":"Dutch \/ Eye Chart","offer_id":45921510752417,"sku":"4065","price":90.0,"currency_code":"USD","in_stock":true},{"title":"Finnish \/ Eye Chart","offer_id":45921510785185,"sku":"4066","price":90.0,"currency_code":"USD","in_stock":true},{"title":"Swedish \/ Eye Chart","offer_id":45921510817953,"sku":"4067","price":90.0,"currency_code":"USD","in_stock":true},{"title":"Italian \/ Eye Chart","offer_id":45921510850721,"sku":"4068","price":89.75,"currency_code":"USD","in_stock":true},{"title":"French \/ Eye Chart","offer_id":45921510883489,"sku":"4069","price":90.0,"currency_code":"USD","in_stock":true},{"title":"Norweigian \/ Eye Chart","offer_id":45921510916257,"sku":"4060-19","price":89.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0718\/4321\/7569\/files\/d5df152e20908e75d0017d93f2a154f3_XL-scaled-1_e723dc5f-0ffe-4fa3-be7f-1d71463a7c7f.jpg?v=1776157247","url":"https:\/\/precision-vision.com\/products\/low-vision-mixed-contrast","provider":"Precision Vision","version":"1.0","type":"link"}