PATENT CLAIM ANALYSIS

Application Number: 15867376
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-05
Patent Classification: ["351", "212000"]

Abstract:
Methods for improving gaze tracking are presented. These methods eliminate the need for a separate initial calibration step to determine whether the subject is properly centrally fixated during testing. In one embodiment, whether the subject is centrally fixated is determined by identifying inlier and outlier gaze descriptors; the inliers are assumed to be associated with central fixation. This reduces the total time required for testing. These methods also improve the accuracy of gaze tracking during testing without the need for individual subject calibration. Instead, a database of reference eyes is used. The subject's eye can be compared to the reference eyes, and the mapping function for one or more reference matches can be used to estimate the subject's gaze direction. In another embodiment, previous calibration data from the same subject can be used to determine whether the subject is properly centrally fixated and/or the direction of the subject's gaze.

Claim (Index 1):
A method for determining a subject's gaze direction during a visual field test using a perimeter, comprising:\n using one or more light sources to create one or more reflections from an ocular surface; determining a shape descriptor for the subject's eye; comparing the shape descriptor for the subject's eye to predetermined shape descriptors for a set of reference eyes to determine one or more matches; displaying a series of test stimuli to the subject; collecting responses to the stimuli from the subject; analyzing the responses to determine the sensitivity of the subject's visual field; imaging the subject's eye with a camera while the stimuli are displayed; determining a gaze descriptor for the subject's eye for each test stimulus by analyzing the reflections of the light sources in the image; inputting the gaze descriptor for the subject's eye for each test stimulus into a predetermined mapping function determined from the one or more matched reference eyes to determine the subject's gaze direction during each test stimulus; and for any response to a test stimulus wherein the determined deviation in gaze direction exceeds a threshold, performing one of the following steps: (a) disregarding the response; (b) flagging the response to the clinician; or (c) reassigning the response to a different location.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 86.0
- Lexical Diversity: 2.03704
- Patent Class: 351.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13781051', '14919491', '13964624', '14216350', '15670553']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6168533178903728
- 35 USC 102 Novelty (BERT): 0.5776139597995922
- Combined Prediction Score: 0.6129293820812948
- Mean Citation Score: 367.3005920000001
- Max Citation Score: 510.48932
- Similarity Product: 451.95505018457646

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test