Patent ID: 7625087

Claim:
A pupillometric apparatus for assessing pupillary near reflex in respect of at least one eye of a subject, the apparatus comprising an eyepiece for positioning against the eye, sensing illumination means whereby in use the eye may be illuminated to generate images defining the pupil thereof, detector means permitting generation of pupil dimension data from the images, and background illumination means serving in use to provide background illumination to the eye, wherein the apparatus further comprises a visible fixation point which is moveable between near and far positions and which in use is viewable through the eyepiece by way of an accommodation lens positioned between the eyepiece and the near position of the fixation point, the focal length of the lens exceeding its distance from the far position of the fixation point whereby the distance between observed virtual positions in respect of the fixation point at its near and far positions exceeds the actual distance between these positions.