5.1.4: Functionality closed to text enlargement
Where any functionality of ICT is closed to the text enlargement features of platform or assistive technology, the ICT shall provide a mode of operation where the text and images of text necessary for all functionality is displayed in such a way that a non-accented capital "H" subtends an angle of at least 0,7 degrees at a viewing distance specified by the supplier.
The subtended angle, in degrees, may be calculated from:
Ψ = (180 x 60 x H) / (π x D)
- ψ is the subtended angle
- H is the height of the text
- D is the viewing distance.
- D and H are expressed in the same units
The intent is to provide a mode of operation where text is large enough to be used by most users with low vision.
|Type of compliance||Inspection and measurement|
|Result||Pass: Check 2 is true
Fail: Check 2 is false