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Anterior or Posterior? Pop quiz time!

I get asked a lot about anterior versus posterior blepharitis. Let's have some fun!
I'm going to show you photos and you're gonna tell me if it's anterior or posterior blepharitis. Yep, this is a pop quiz.

Congratulations to everybody that scored 100%. Great job.

(answers: 1) anterior; 2) anterior; 3) posterior; 4) posterior.)