Apparatus to measure accommodation of the eye

James Wolffsohn (Inventor), Mark Prince (Inventor), James Watkins (Inventor)

Research output: Patent

Abstract

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.
Original languageEnglish
Patent numberGB 1015282.5
IPCA61B3/032
Publication statusPublished - 14 Sep 2010

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Display devices
Sensors

Bibliographical note

Patent not maintained

Cite this

Wolffsohn, J., Prince, M., & Watkins, J. (2010). IPC No. A61B3/032. Apparatus to measure accommodation of the eye. (Patent No. GB 1015282.5).
Wolffsohn, James (Inventor) ; Prince, Mark (Inventor) ; Watkins, James (Inventor). / Apparatus to measure accommodation of the eye. IPC No.: A61B3/032. Patent No.: GB 1015282.5.
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abstract = "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.",
author = "James Wolffsohn and Mark Prince and James Watkins",
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Wolffsohn, J, Prince, M & Watkins, J 2010, Apparatus to measure accommodation of the eye, Patent No. GB 1015282.5, IPC No. A61B3/032.

Apparatus to measure accommodation of the eye. / Wolffsohn, James (Inventor); Prince, Mark (Inventor); Watkins, James (Inventor).

IPC No.: A61B3/032. Patent No.: GB 1015282.5.

Research output: Patent

TY - PAT

T1 - Apparatus to measure accommodation of the eye

AU - Wolffsohn, James

AU - Prince, Mark

AU - Watkins, James

N1 - Patent not maintained

PY - 2010/9/14

Y1 - 2010/9/14

N2 - 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.

AB - 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.

M3 - Patent

M1 - GB 1015282.5

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Wolffsohn J, Prince M, Watkins J, inventors. Apparatus to measure accommodation of the eye. A61B3/032. 2010 Sep 14.