Does each User need their own EyeQue account or can everyone use the same account?

If you wish to use your miniscope with multiple people, each user must have their own account.  Your EyeQue Refraction Measurements (ERM) are produced from your account's data and if multiple users are using the same account, that data is going to be skewed.  Combining tests from multiple accounts will create bad results and inaccurate ERM.  You want the results you receive to be yours and yours alone, not an amalgamation of multiple users.  If you want to let someone try your miniscope without making a new account, have them take a test in Practice Test mode since those results do not count toward your final ERM.  Only completed vision tests in Test mode are used to calculate ERM.