Method for determining distances in the anterior ocular segment

Details Method for determining distances in the anterior ocular segment Method for determining distances in the anterior ocular segment

2007-10-23

2007-10-23

Mai, Huy (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S206000, C351S208000

Reexamination Certificate

active

10468241

ABSTRACT:
The invention relates to a method for determining distances in the anterior ocular segment, preferably of the pupils and/or the diameter of the iris, wherein the image of at least part of the eye is recorded and digitized using an imaging device and an array for illuminating the eye. On the basis of said digital image, a center of gravity analysis and the determination of the central point are carried out, especially for the position of the pupils, by conducting an intensity and threshold analysis as rough determination. Based on said rough determination, a fine detection of the position of the edges of the pupil and/or the edges of the iris is carried out. Additionally, the angle between the visual axis and the optical axis of the eye can be determined from the position of a fixed reflection to the center of the pupil and/or the center of the iris.

REFERENCES:
patent: 4319564 (1982-03-01), Karickhoff
patent: 4398812 (1983-08-01), Kelman
patent: 4812033 (1989-03-01), Ishikawa
patent: 5036347 (1991-07-01), Tsunekawa et al.
patent: 5071245 (1991-12-01), Fukuma et al.
patent: 5231674 (1993-07-01), Cleveland et al.
patent: 5327191 (1994-07-01), Shindo et al.
patent: 5428413 (1995-06-01), Shindo
patent: 5474548 (1995-12-01), Knopp et al.
patent: 5491757 (1996-02-01), Lehmer et al.
patent: 5671447 (1997-09-01), Tokunaga
patent: 5790235 (1998-08-01), Kirschbaum
patent: 5797046 (1998-08-01), Nagano et al.
patent: 5822033 (1998-10-01), Ishikawa et al.
patent: 5835797 (1998-11-01), Odaka
patent: 5887200 (1999-03-01), Aoyama
patent: 5889577 (1999-03-01), Kohayakawa
patent: 5913079 (1999-06-01), Aoyama et al.
patent: 6035054 (2000-03-01), Odaka et al.
patent: 6081607 (2000-06-01), Mori et al.
patent: 6322216 (2001-11-01), Yee et al.
patent: 6419638 (2002-07-01), Hay et al.
patent: 6611283 (2003-08-01), Isonuma
patent: 6779891 (2004-08-01), Barth et al.
patent: 2002/0049431 (2002-04-01), Smith et al.
patent: 2004/0070728 (2004-04-01), Bergner et al.
patent: 196 41 632 (1997-05-01), None
patent: 196 18 883 (1997-11-01), None
patent: 196 49 542 (1998-04-01), None
patent: 0 821 912 (1998-02-01), None
patent: 02000004 (1990-01-01), None
patent: 05-168597 (1993-07-01), None
patent: 05285113 (1993-11-01), None
patent: 06-277182 (1994-10-01), None
patent: 07-136115 (1995-05-01), None
patent: 07174541 (1995-07-01), None
patent: 07-249197 (1995-09-01), None
patent: 08-238222 (1996-09-01), None
patent: 09-192101 (1997-07-01), None
patent: 10040375 (1998-02-01), None
patent: 10057319 (1998-03-01), None
patent: WO92/05736 (1992-04-01), None
patent: WO97/42920 (1997-11-01), None
patent: WO 00/33729 (2000-06-01), None
International Search Report.

Affiliated with

Also associated with

Rating

Method for determining distances in the anterior ocular segment does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for determining distances in the anterior ocular segment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for determining distances in the anterior ocular segment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3824262