Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2017 May 19;11:939–944. doi: 10.2147/OPTH.S135128

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2017 Brodie et al. This work is published and licensed by Dove Medical Press Limited

The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

PMC Copyright notice

(A) The translucent box represents the ideal position while the “happy face” represents the patient’s actual head position relative to it. The patient, although not perfectly aligned, is within the acceptable tolerance. The device provides real-time feedback; “just right” is displayed to visually reinforce patient position, and the alarm feature is silenced when the patient is within the set limits. (B) The patient exceeds the device tolerance, and, as in (A), the device provides real-time feedback. “Tilt right” instructs the patient how to move into correct position, and the alarm sounds after 2 minutes of malposition. The image mirrors the patient’s position.