Use them in a room with sufficient daylight.
The plates should be located at a distance of about 70 cm from the person being examined so that the paper level is at the right angle to the line of sight.
The numbers or symbols displayed in the tables are stated, and each answer must be given without delay (less than three seconds).
It is not necessary in all cases to use the specified series of plates.<\/p>\n","protected":false},"excerpt":{"rendered":"
Series with Ishihara plates for quick and accurate diagnosis of color vision deficiency from birth. This is the most common form of color vision disorders. Most cases of congenital lack of vision coloration are characterized by a red-green deficiency, which can be of two types: first, a protan type that can be absolute (protanapia) or partial (protanomalia), and second, a deutan type that can be absolute (deuteranopia) or partial (deuteranomalia).<\/p>\n","protected":false},"featured_media":123064,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[3097,3099,3124,3151],"product_tag":[],"class_list":["post-123063","product","type-product","status-publish","has-post-thumbnail","product_cat-diagnostika-iatrika-mixanimata2","product_cat-items-by-specialty","product_cat-ofthalmologikes-diagnostikes-suskeues","product_cat-ophthalmology","pa_brands-loipoi-promitheftes","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"\n