Optician Training: Glaucoma (Ocular Anatomy Lecture 21)

In this lecture we continue to look at Ocular anatomy with a detailed look at the Glaucoma and how it applies to us as Opticians.
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[@vrclckd-zz3pv]

Hi
I'm not an optician but could you answer a question for me?
I'm doing some Data Science work for school and as part of the assignment we were given a big excel spreadsheet full of patient data which we have to clean up (fix erroneous data, filling missing data, etc). I have two columns on Intraocular Pressure measured with two different methods (Pneumatic machine and Perkins instrument). From what I've read in some medical text books these seem to measure the same thing, but in cases where my spreadsheet has both entries they differ. Is there some sort of equation linking the two like how Fahrenheit is linked to Celsius? I've tried plotting the points to find a relationship but they don't make a nice line so I'm thinking they're two different measurements from different points in time but I wasn't sure. If you were to measure the same patient's IOP on the same day using both methods should they give you exactly the same result?
Thank you.

[@modernoptician]

Both are measured in mmHg. The difference is related to accuracy. Perkins tonometry uses aplanation of the corneal surface while the pneumatic system is just a puff of air. Not sure about the intended outcome of your assignment, but having both figures is redundant. The Perkins data is much more accurate.

[@vrclckd-zz3pv]

@@modernoptician Ah that's useful to know. Thank you very much. I'll replace the missing pneumatic data with the Perkins data where I can.
Edit: For the assignment they gave us some artificially corrupted patient data in an excel file and we have to roleplay as data scientist hired to help the optician recover as much patient data as possible, but they gave us zero context as to what any of the data is and we're CS students so we don't have any medical background haha. Which is why I went looking for Opticians on RUclips to ask questions to.