Precision Vision has been the leader in reading card production for use in research and near vision assessment for many years with the MNread and Colenbrander Reading cards. Now, we include the Radner Reading Cards and would like to more fully introduce to you the features, history and how they were developed to assist in patient care and research.
Radner Reading Cards are the latest addition to the Precision-Vision reading card line.
The Radner Reading Charts system was developed by the Ophthalmologist Wolfgang Radner, MD in Vienna in interdisciplinary cooperation with Psychologists, Linguists, Physicists and Statisticians.
They come in the form of a booklet (size: letter) with three reading cards, a card with numbers, and one with Landolt rings. It also includes clear instructions and evaluation sheets.
The Radner Charts are available in English, Spanish, Dutch, Swedish, Hungarian and German. A French and Portuguese version is under development.
The Radner Charts are the first to offer optimized sentences optotypes of highly standardized grammatical construction, being equal in number (14 words), position and length of words.
Sentence optotypes have been selected statistically to ensure same difficulty level and reading time. For each language the sentences optotypes have been developed by taking language characteristics into account.
In a second step this Reading Chart system has been statistically carefully proven according to most recent statistical requirements, to achieve best quality for clinical and research purposes. All results have been published (see: selection of publications below).
The Radner Reading Charts are logarithmically scaled in logRAD (reading equivalent of logMAR) but also offer Visus, M and the US-Snellen scaling for 32cm and 40 cm.
Print sizes vary from 6.3 M to 0.25 M (20/320 to 20/12.5 at 40 cm).
A correction scale for varying reading distances given on each chart allows to achieve well defined logRAD results for every reading distance.
The high quality of standardization facilitates accurate reading acuity determinations in everydays practice. It has also been successfully used in a wide range of clinical research projects..
Overall a practically very useful tool.
The 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.
Visit Precision Vision at the following tradeshows. If you are attending one of these tradeshows and want to avoid unnecessary shipping costs and delays, we’d be happy to bring small portable products to the meeting. Place your order online or call us at 800-772-9211. Just be sure to tell us which tradeshow to hold the products for.
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