Detect if field or other feature exists

Is there a way in Tasker (I know there is in Autoinput, but it slows down my device something fierce) to detect if a field or another object exists? I know how to find the ID of a field or another object, but I'm not sure how to check to see if the field exists on screen, although I'm sure that there is a method of scripting this. Can anyone assist?

Thank you!