corrected visual acuity, a variety of test symbols are used by ophthalmologists and opticians. In addition to Landolt rings, Snellen charts, letters and numbers, symbols can also be used which are displayed [...] displayed at a specified distance via charts or test symbol projectors. Despite their differences in appearance, all these test symbols have one thing in common - their size is always five times the thickness of [...] recognise a test symbol that has a line width of less than 1 minute of arc, then their visual acuity will be 1. If the person being tested has a visual acuity of only 0.5, then the test symbol displayed must
centrally under the displaySimple, intuitive operation via touchscreen with clearly recognisable symbolsYou can write under the reading device when it is in the tilted positionProduct PropertiesNon-reflective [...] central position (glare-free)User inputtouch screenUser supporttactile function keys high-contrast symbols charging status indicator (LED) charging status indicator (screen icon)Display modestrue colours
centrally under the displaySimple, intuitive operation via touchscreen with clearly recognisable symbolsYou can write under the reading device when it is in the tilted positionProduct PropertiesNon-reflective [...] central position (glare-free)User inputtouch screenUser supporttactile function keys high-contrast symbols charging status indicator (LED) charging status indicator (screen icon)Display modestrue colours
centrally under the displaySimple, intuitive operation via touchscreen with clearly recognisable symbolsYou can write under the reading device when it is in the tilted positionProduct PropertiesNon-reflective [...] central position (glare-free)User inputtouch screenUser supporttactile function keys,high-contrast symbols,charging status indicator (LED),charging status indicator (screen icon)Display modestrue colours
line/reading lineUser supporthigh-contrast function keys tactile function keys large icons high-contrast symbols confirmation tones mehrsprachig charging status indicator (LED) charging status indicator (screen
line/reading lineUser supporthigh-contrast function keys tactile function keys large icons high-contrast symbols confirmation tones mehrsprachig charging status indicator (LED) charging status indicator (screen
selection dialUser supporthigh-contrast function keys tactile function keys large icons high-contrast symbols confirmation tones mehrsprachig charging status indicator (LED) charging status indicator (screen
selection dialUser supporthigh-contrast function keys tactile function keys large icons high-contrast symbols confirmation tones mehrsprachig charging status indicator (LED) charging status indicator (screen
selection dialUser supporthigh-contrast function keys tactile function keys large icons high-contrast symbols confirmation tones mehrsprachig charging status indicator (LED) charging status indicator (screen
selection dialUser supporthigh-contrast function keys tactile function keys large icons high-contrast symbols confirmation tones mehrsprachig charging status indicator (LED) charging status indicator (screen
