My problem is double vision: several parts of the same image layered on top of each other but tilted and shifted. This is irrelevant for my design process because I am not color blind and have a trained eye for color tones. If it's too dark I can't see stairs but I see black walls that aren't there - scared to run against them. In my case I need proper contrasts to see what's going on. But with correction (glasses/contact lenses) I am officially not impaired even if I feel like that. In my very own case: I have Keratoconus (progressive thinning of the cornea, may result in blurry vision, double vision, nearsightedness and light sensitivity). By classification I am concidered to have mild to moderate visual impairment and moderate to severe visual impairment without correction. There are so many different difficulties people can have with their eyes. But - please correct me if I'm wrong - it doesn't suffice to check by estimation if you have to design objects that have strict rules regarding accessibility for visual impaired people. It is an easy work around for checking contrasts.
Therefore you must have the possibility to measure cap height and x-height and setting them automatically. When you choose a font you can check it of size and contrast. If it is possible to define presets you can add other guides as well. is a service offered by the German Federation of the Blind and Partially Sighted (Deutscher Blinden- und Sehbehindertenverband) RGB for screen, CMYK for printed materials, also some color swatches like HKS or Oracalįont size calculator (Calculating and testing easily accessible font sizes from mobile devices and books to traffic and advertising signs)Ĭalculates Distance in cm, Visual acuity, Ratio of x-height to font size, Text types (Reading text, Consultating text, Signalling text) and available Lighting On the german site you will find helpful calculators in German and English:Ĭontrast calculator (Calculating and testing easily accessible colour combinations for screen and print)
0 kommentar(er)
