View source for Tono-Pen use

==To Use (if already calibrated)==
*Depressing the Operator Button ONCE
*Monitor should show TWO lines (====).
*Use on eye

==To Calibrate==
*The Pen should be calibrated if the batteries have been changed or if the LCD reads “CAL” followed by “- - - -”.
*Calibration involves depressing the Operator Button TWICE and getting ONE line (- - - -). 
*If so, 
*#Point the transducer end straight down towards the floor.
*#Press the Operator Button “distinctly, two times, within 1.5 seconds.”
*#Initially “CAL” appears on the LCD, followed by “UP” (after about 15 - 30 seconds!)
*#Invert the transducer end to point straight up toward the sky.
*#*A properly functioning Pen will display “”Good”.
*#*If “bAd”, repeat the calibration again.

===If unsuccessful===
Options include:
*clean the tip (compressed air is recommended)
*change the batteries. 
**Use the little probe that came with the Pen to open the battery compartment.
*Tech Support
**www.reichert.com
**www.tonopen.us
**1-888-849-8955

==See Also==
*[[Eye pain]]
*[[Acute angle closure glaucoma]]
*[[IOP]]
==References==
<references/>

[[Category:Procedures]]
[[Category:Ophthalmology]]

==External Links==

===Videos===
{{#widget:YouTube|id=sBosdQ6o1oY}}