A device for measuring a user's range of clear focus (accommodation) comprising: a display for displaying a test image to the user at a first size; a sensor for determining the separation between the display and the user; and a processor for determining the angular subtence of the image to the user and to resize the test image in order to substantially maintain the angular subtence of the image when the separation between the display and the user is varied.
|Patent number||GB 1015282.5|
|Publication status||Published - 14 Sep 2010|
Bibliographical notePatent not maintained
Wolffsohn, J., Prince, M., & Watkins, J. (2010). IPC No. A61B3/032. Apparatus to measure accommodation of the eye. (Patent No. GB 1015282.5). http://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20120322&DB=EPODOC&locale=en_EP&CC=WO&NR=2012035336A1&KC=A1&ND=4