Lecture 9 - Tonometry 2 Flashcards
What are the three types of contact tonometers?
GAT, Handheld Perkins and Tonopen
When do you use a tonopen?
Person with anxiety levels to proximity of the examiner and instrument
In regards to the TONO XL, how many clicks are nessecary once you have found your average IOP?
Beep.
Note: 5% error
When do you use hand held perkins?
Anxiety from the slit lamp with GAT
apparatus
Note: Pt. will usually get a false high reading
If a pt. is allergic to Novocaine, what is safe to use?
Proparacaine with fluorescein strip
Why do you need fluorescein when using tono?
DEMARCATE THE FLATTENED CORNEAL AREA
Why do we numb both eyes?
reflex blink will decrease
Why do we tell our pt to look straight ahead?
So convergence doesn’t occur
What is the hardest part for the pt. in regards to GAT?
waiting
What is your goal when you are try to applanate when using GAT?
Centralize and Equalize
How do you know when Tonometry has been completed with perkins handheld or tonopen?
The “a” in the diagram below is the way to know this
Ta <
After using the GAT, you scan the cornea and notice a toe mark. What should you do next for the pt?
Give them artificial tears
