Mobile Low Vision Testing Instructions Wanted

Hi,
Where can I look to find instructions for low vision mobile testing for IOS and Android? I’m finding lots for VoiceOver so far.

Thanks.

Jim

==========
Jim Homme,
Team Lead and Accessibility Consultant,
Bender HighTest Accessibility Team
Bender Consulting Services, Inc.,
412-787-8567,
jhomme@benderconsult.com
http://www.benderconsult.com/our%20services/hightest-accessible-technology-solutions
E+R=O