{"product_id":"tavole-ishihara-10-tavole","title":"Ishihara Plates - 10 Plates","description":"\u003cp\u003e\u003cstrong\u003eA series of plates designed to provide a quick and accurate test for determining congenital color vision deficiency, the most common form of color vision disorder.\u003c\/strong\u003e \u003cbr\u003eThe examination of color sense is performed by discriminating the different colors of the background and the signs10a. \u003cbr\u003eIshihara plates are used for the diagnosis of dyschromatopsia, in optic neuropathies, and congenital or acquired maculopathies.\u003cbr\u003e\u003cbr\u003e10a: the different colors are located on the same confusion line. They detect:\u003cbr\u003e- Protanopia (red): The visible range of the spectrum in red is shorter than normal, and the part of the spectrum that normally appears blue-green appears gray to those affected by protanopia.\u003cbr\u003e- Deuteranopia (green): The part of the spectrum that appears green to those with normal vision appears gray, and the visible range of the spectrum is divided by this zone into two areas, each of which appears different. The visible range of the spectrum is not contracted, in contrast to protanopia. Red-purple, the complementary color of green, also appears gray.\u003cbr\u003e\u003cbr\u003eIn acquired forms of color vision deficiency, protanopia and deuteranopia are indicative of optic neuropathy.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eUsing the plates:\u003c\/strong\u003e\u003cbr\u003eThe examination can be performed indoors with natural lighting of more than 300 lux.\u003cbr\u003eWhen it is necessary to use electric light, although not desirable, the lighting must be adjusted to simulate natural light as much as possible.\u003cbr\u003eLocations next to grounds with green trees or areas influenced by bright colors should be avoided, as they could produce certain discrepancies in the results.\u003cbr\u003e\u003cbr\u003eThe plates must be held at a distance of 50\/75 cm from the subject being examined.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFirst examination:\u003c\/strong\u003e\u003cbr\u003eThe first examination is performed by showing two geometric figures, a circle and a square, respectively. \u003cbr\u003eBefore starting the examination, it is important that the subject fully understands what they are being asked to do, namely to recognize them. Plates 1 and 2 will be used for this purpose.\u003cbr\u003ePlates 3 and 4, in black and white, will be used only if the subject shows difficulty in recognizing plates 1 and 2, as the black background facilitates their identification.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSecond examination:\u003c\/strong\u003e\u003cbr\u003eThe second examination is performed by presenting the subject with plates featuring curved lines, specifically numbers 6, 7, and 8. In this case, it is important to take care to keep the plates being examined at the proper distance, at least 50 cm.\u003cbr\u003e\u003cbr\u003e⚠️\u003cem\u003e\u003cstrong\u003eThe 2019 and 2024 editions are identical in all material – contents, plates, and charts – and differ exclusively in the year of production indicated.\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Gima","offers":[{"title":"Default Title","offer_id":49646158250320,"sku":"DG0004682","price":76.3,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/3996\/8592\/files\/TavoleIshihara-10Tavole.png?v=1765529142","url":"https:\/\/www.cfs.it\/en\/products\/tavole-ishihara-10-tavole","provider":"CFS Prodotti Medicali s.r.l.","version":"1.0","type":"link"}