Some fonts are more legible than others. This has been addressed by various standards, for example in the field of ergonomics and also in the context of regulation for labels on food or pharmaceutical items.
That much said - legibility as such is a usability aspect not an accessibility aspect. Accessibility rules though could build on top of usability aspects and require a heighten degree of usability.
It is important to understand that legibility rules depends a lot on context: viewing distance, amount of text, purpose of the information conveyed, etc. A long text benefits from a different font than the four letters 'STOP' on a stop sign.
Olaf
> On 21. Jun 2018, at 10:58, Gian Wild <gian@accessibilityoz.com <mailto:gian@accessibilityoz.com>> wrote:
>
> Hi
>
> Does anyone have some research or evidence about the accessibility of different fonts? We have come across a very thin-lined font and we have been asked for proof that it is harder to read than normal font.
>
> Thanks
> Gian
>
> (Sorry for cross-posting)
>
> Get Outlook for iOS <https://aka.ms/o0ukef>