Assistive Technology Detection

Hello Everyone! I had a question come in today from a student. I'm hoping this group might be able to provide some insight...
Question:"I understand accessibility needs to be integrated into every aspect of your website. I was wondering if there is any way to detect whether a user is using support for their disability and then adjust your website to support them even more? Kind of similar to the way Responsive Web Design detects browser window size then adjusts accordingly?"

Thank you!
Best,Patti 
Patti Burke LundColorado State University | Journalism & Media Communicationpatricia.burke-lund@colostate.edu | pburkelund@yahoo.com | www.colostate.eduLinkedIn