Patent ID: 8025400

Claim:
A pupilometer comprising: an optical sensor including an image capture device having an image detection surface; a sensing optical path coupling the sensor with an eye measurement location, wherein the sensing optical path images at least a sufficient portion of the pupil and the outer iris boundary of an eye disposed at the eye measurement location onto the image detection surface of the image capture device so that the pupilometer can determine a center of the pupil relative to a center of the outer iris boundary; a variable brightness illumination source; and, a processor coupled to the optical sensor and the variable brightness illumination source, the processor having tangible media embodying machine-readable code for determining a relationship between: changes in brightness of illumination at the eye measurement location, and location of the pupil center relative to the outer iris boundary of the eye disposed at the eye measurement location wherein the processor further comprises a display for showing a graphical representation of the relationship; and wherein the graphical representation of the relationship comprises a plot of pupil center location versus brightness level, the plot comprising a plurality of plotted data points, the plurality comprising a data point from each of at least three differing brightness levels measured at the eye measurement location.