Objective eye alignment measurement method and system
AssigneeGeneral Electric Company
InventorsCarl M. Penney, Keith P. Thompson, Robert H. Webb
Life of this patent
Estimating the term…
Abstract
Eye alignment is determined by producing a combined iris/retinal image by use of an imaging system. The relative position of the centroid of the pupil and various structures on the retina is indicative of the eye alignment. The eye alignment may be determined by comparing a combined iris/retinal image at the present time with a stored iris/retinal image at a past time. The imaging system may be a laser scanning ophthalmoscope.
Claims22
A method of determining objective eye alignment comprising the steps of:
- positioning a subject's eye relative to an imaging system to allow imaging of the subject's eye;
- applying a beam to the subject's eye;
- using the imaging system to detect a portion of the beam returned after striking the subject's eye and to generate, based on the detected portion of the beam, an iris image of an iris portion of the subject's eye and a retinal image of a retinal portion of the subject's eye;
- and
- observing positions of said iris image and said retinal image to determine objective eye alignment.
A method of determining objective eye alignment comprising the steps of:
- scanning a light beam from an imaging system across a subject's eye such that the light beam strikes an iris portion adjacent a pupil and strikes a retinal portion;
- detecting, by operation of the imaging system, scattered light from the application of the light beam to the iris portion and the retinal portion;
- generating nearly simultaneous views of the iris portion and the retinal portion by operation of the imaging system;
- and
- using said nearly simultaneous views to determine objective eye alignment.
A system for measuring objective eye alignment comprising:
- a scanner for scanning a beam across a subject's eye such that the beam strikes an iris portion adjacent a pupil and strikes a retinal portion;
- a detector for detecting scatter from the application of the beam to the iris portion and the retinal portion;
- a stop having an aperture through which scatter from the application of the beam to the iris portion and the retinal portion passes on its way to said detector;
- and
- a first monitor operatively connected to said detector for showing simultaneous views of the iris portion and the retinal portion based upon the scatter detected by the detector, the simultaneous views providing objective eye alignment information.
A system for measuring objective eye alignment comprising:
- a scanner for scanning a beam across a subject's eye such that the beam strikes an iris portion adjacent a pupil and strikes a retinal portion;
- a detector for detecting scatter from the application of the beam to the iris portion and the retinal portion;
- a first monitor operatively connected to said detector for showing simultaneous views of the iris portion and the retinal portion based upon the scatter detected by the detector, the simultaneous views providing objective eye alignment information;
- and a second monitor and storage means to supply the second monitor with a stored image of the iris portion and the retinal portion at a previous time.
A system for measuring objective eye alignment comprising:
- a scanner for scanning a beam across a subject's eye such that the beam strikes an iris portion adjacent a pupil and strikes a retinal portion;
- a detector for detecting scatter from the application of the beam to the iris portion and the retinal portion;
- monitor means operatively connected to said detector for showing simultaneous views of the iris portion and the retinal portion based upon the scatter detected by the detector, the simultaneous views providing objective eye alignment information;
- and
- storage means connected to the monitor means for supplying the monitor means with a stored image of the iris portion and the retinal portion at a previous time.
Dependencies are inferred from the claim text.