“What is the ‘Air Puff’ test and why do I need it?” Testing internal eye pressure is an essential part of your routine eye exam. Whether it’s measured with the air puff (non-contact tonometry), “the blue light” (Goldmann applanation tonometry), or another eye pressure-measuring instrument, it’s important for us to make sure your eye pressure is within the normal range (9-21 mmHg.) If it’s higher than normal we have to work to determine why it appears high and initiate treatment to bring it back