Thank you, really appreciate the detailed feedback! It seems like it is likely the no-script, will look into this soon.

The exam we provided is just a free sample for folks to play with - contact information is collected for paying customers (in a slightly different flow).

Did you do the exam on mobile or desktop? Also, what browser were you using?

Desktop, using Firefox on Windows, with no-script active. That last part might be the issue - everything seemed to work until the end - it would not let me submit, then I disabled no-script, and I submitted, but it never asked me for contact info?

Not sure how you'll get back to me, it never asked for an email or anything.

The no-script might be at fault though. You might consider not using any CDN for scripts, only host locally.

I did not try again because I don't have a prescription (I submitted an image saying "no prescription"), and I realized it can't do anything for me (I just wanted a checkup basically - just tell me how I did on the various sized letter thing).