Under Pressure: A Tonopen Tutorial

Prepare

1. Find your Tonopen. At our shop the Tonopen lives in the cabinet in the attending office.

2. Adequate corneal analgesia is key. Instill tetracaine in both eyes prior to using the Tonopen.  

3. If you are assessing the patient for corneal abrasions, perform the fluorescein exam prior to using the Tonopen as the Tonopen may inadvertently cause small abrasions.  

4. Place a cover over the tip. It slides on like a condom and then roll the ridge into the grove.