{"title":"SV Near Vision","description":"","products":[{"product_id":"maddox-twirl-chrome-frame-clear","title":"Maddox Twirl, Chrome Frame, Clear","description":"\u003cdiv class=\"ewa-rteLine\"\u003eMaddox Twirl, Chrome Frame, Clear\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53796756750679,"sku":"SV-SGR-246-MCC","price":44.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SGR-246-MCC.jpg?v=1781603882"},{"product_id":"maddox-twirl-chrome-frame-green","title":"Maddox Twirl, Chrome Frame, Green","description":"\u003cdiv class=\"ewa-rteLine\"\u003eMaddox Twirl, Chrome Frame, Green\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53796756783447,"sku":"SV-SGR-246-MCG","price":44.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SGR-246-MCG.jpg?v=1781603882"},{"product_id":"maddox-twirl-chrome-frame-red","title":"Maddox Twirl, Chrome Frame, Red","description":"\u003cdiv class=\"ewa-rteLine\"\u003eMaddox Twirl, Chrome Frame, Red\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53796756816215,"sku":"SV-SGR-246-MCR","price":44.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SGR-246-MCR.jpg?v=1781603881"},{"product_id":"maddox-twirl-plastic-frame-clear","title":"Maddox Twirl, Plastic Frame, Clear","description":"\u003cdiv class=\"ewa-rteLine\"\u003eMaddox Twirl, Plastic Frame, Clear\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53796756881751,"sku":"SV-SGR-246-MPC","price":41.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SGR-246-MPC.jpg?v=1781603876"},{"product_id":"maddox-twirl-plastic-frame-green","title":"Maddox Twirl, Plastic Frame, Green","description":"\u003cdiv class=\"ewa-rteLine\"\u003eMaddox Twirl, Plastic Frame, Green\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53796756914519,"sku":"SV-SGR-246-MPG","price":41.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SGR-246-MPG.jpg?v=1781603875"},{"product_id":"maddox-twirl-plastic-frame-red","title":"Maddox Twirl, Plastic Frame, Red","description":"\u003cdiv class=\"ewa-rteLine\"\u003eMaddox Twirl, Plastic Frame, Red\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53796756947287,"sku":"SV-SGR-246-MPR","price":41.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SGR-246-MPR.jpg?v=1781603874"},{"product_id":"irest-international-reading-speed-texts","title":"IReST – International Reading Speed Texts","description":"\u003cdiv class=\"ewa-rteLine\"\u003eHighly calibrated for reproducible results across all languages\n\nEasy to use\n\nEasy to handle\n\nEasy to measure (by stopwatch)\n\nEasy to calculate (normal values and formula included)\n\n\n\n\nCharacteristics:\n\n\nComparability between languages for international studies\n\nNatural conditions: newspaper print, meeting the demands of everyday life\n\n\n\n\nApplications:\n\nFor normal subjects\n\nFor patients with low vision (monitoring of disease, effect of treatment and rehabilitation)\n\nFor patients with developmental dyslexia (severity of reading disorder, effect of training, etc.) – for juveniles and adults\n\nLow Vision patients\n\nDisease monitoring in AMD, especially in treatment studies\n\nAfter refractive surgery\n\nAfter multifocal intraocular lenses\n\nNeurological reading disorders\n\nDevelopmental dyslexia\n\nStudies with normal subjects\n\n\n\n\nUser groups:\n\nOphthalmologists and neurologists\n\nOptometrists and ophthalmic opticians\n\nOrthoptists and low vision specialists\n\nTeachers and psychologists\n\nAll reading researchers\n\nThe IReST differs from prior text charts that used single sentences by employing linguistically standardized paragraphs. They close a gap in the diagnostics of reading performance. The paragraphs are designed to resemble everyday life situations of reading continuous text, such as in books or newspapers. The level of difficulty corresponds to sixth grade reading (10–12 years), which is comprehensible for teenagers and adults. Due to lower variance, measuring reading time of a complete paragraph rather than a single sentence or random words is more reliable. Furthermore, it can provide some information about fluency, fatigue, and mistakes.\n\nArticle of Interest: Effects of home reading training on reading and quality of life in AMD – a randomized and controlled study\n\n\n\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53796960174423,"sku":"SV-SDT-IRE-ST","price":141.94,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SDT-IRE-ST.jpg?v=1781603790"},{"product_id":"radner-reading-chart","title":"Radner Reading Chart","description":"\u003cdiv class=\"ewa-rteLine\"\u003eThe Radner reading chart is a highly standardized multilingual reading test system that was recently developed for clinical practice and research. During the past few years, it has become an international project; together with several universities developed an international and interdisciplinary cooperation with psychologists, linguists, statisticians and ophthalmologists. The result of the collaboration is a standardized, valid and reliable reading test system, available in numerous languages.\n\nThe reading chart consists of sentence\n\u003cem\u003eoptotype\u003c\/em\u003es, which are optimized reading test items, standardized by construction and statistical selection. Sentence\n\u003cem\u003eoptotype\u003c\/em\u003es consists of short sentences that are highly comparable in terms of number of words (14 words), word length, position of words, lexical difficulty and syntactical complexity. Language specific characteristics were taken into account as were the number of letters and syllables per word, line, and sentence.\n\nA larger series of such sentences were then tested in different groups of probands (n=200) and the specific sentence\n\u003cem\u003eoptotype\u003c\/em\u003es for the reading charts were selected based on reading length, reading errors, reliability and statistical validity analyses.\n\nThe advantage of such sentence\n\u003cem\u003eoptotype\u003c\/em\u003es is that they minimize variations between test items and keep the geometric proportions constant. Changes in reading performance with smaller print sizes are therefore related to the print size and not to text characteristics. Together with a logarithmic scaling of the print sizes, it enables accurate and comparable measurements of reading acuity and\/or reading speed at different acuity levels, independently of viewing distance.\n\nStandardization was done in cooperation with the Institute of Medical Statistics, University of Vienna (led by Professor Bauer) using a test-retest reliability, inter-chart reliability and a variance component analysis in patient groups of various levels of visual acuity. The results showed an excellent reproducibility, validity, test reliability and inter-chart reliability.\n\nCalculations are based on real word counts and, in addition, it has been shown that the reading speed measurements obtained with sentence\n\u003cem\u003eoptotype\u003c\/em\u003es correlate well (r\u0026gt;0.9) with that of standardized long text paragraphs.\n\n\n\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53796976361815,"sku":"SV-SDT-938-3","price":195.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SDT-938-3.jpg?v=1781603796"},{"product_id":"the-ulster-cardiff-accommodation-cube","title":"The Ulster-Cardiff Accommodation Cube","description":"\u003cdiv class=\"ewa-rteLine\"\u003eThe Ulster-Cardiff Accommodation CUBE has been developed by Maggie Woodhouse (Cardiff University) and Kathryn Saunders (Ulster University) to provide a quick, objective measure of accommodative function (focusing accuracy) in optometric, orthoptic and ophthalmological practice.\n\nWe, and our colleagues, have used a similar device for many years to assess accommodation in babies, young children and those with communication difficulties. Our research, and that of others, has shown that difficulties in producing and maintaining accurate accommodation are extremely common amongst children with special needs and are not uncommon in typically developing children1-5,8,9. The UC-CUBE has been shown to be repeatable and reliable and age-related normative data are available 6,7. Its use allows the practitioner to identify responses that are atypical and require intervention or management.\n\n\n\n\n\n\n\n\n\nTo assess accommodative accuracy, the UC-CUBE simply re-quires the patient to look at illuminated high contrast pictures. Pictures with varying levels of detail are available to allow testing of patients with a range of visual acuities (from approximately 6\/250). Retinoscopy is used to evaluate the accuracy of the patient’s focus while they view the target. A measurement of the size of any defocus can quickly be made using the ruler and evaluated as within or outside normal limits.\n\u003c\/div\u003e","brand":"SV","offers":[{"title":"Default Title","offer_id":53797037965655,"sku":"SV-SNT-UC-CUBE","price":473.59,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/4360\/8663\/files\/SNT-UC-CUBE.jpg?v=1781603913"}],"url":"https:\/\/esp-sv.myshopify.com\/collections\/sv-near-vision.oembed","provider":"ESP\/SV","version":"1.0","type":"link"}