https://prnt.sc/tgoq1n What I normally do is I throw an eye, follow it and run for 1k-2k blocks and then throw another eye.

Case 1: it stays in the same direction

• I just run for 100 blocks (more or less) then throw another one and hope that it goes backwards. Now I know that it's somewhere along that line. (follow case 2 from here, otherwise just keep running) Case 2: it goes backwards
• I run backwards and place some blocks. I move away from the line to get a good angle and throw an eye. Now I just need to see where the lines intersect.

If you're still not sure about where the stronghold is, you can still throw one more eye from a different angle and by then you should be sure about where the stronghold is located.