Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1993-05-17
1995-02-28
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351205, 351215, 351221, 128633, 128666, 128691, 128745, A61B 312, A61B 314, A61B 502
Patent
active
053941993
ABSTRACT:
A method for visualizing the choriocapillaris of the eye in a sequence of ICG angiographic images comprising subtracting each image in the angiographic sequence from a succeeding image. In practice, a modified fundus camera is used to provide digitized images which are subtracted pixel by pixel. To better visualize aberrant vascular structures such as choroidal neovascularization (CNV), a fundus camera is modified with a polarizing filter in front of the light source and an analyzing polarizer in front of the video camera. This results in the suppression of unwanted scattered fluorescence to the extent that the CNV can be better visualized. To assist the surgeon in treating aberrant vascular structures with laser photocoagulation therapy, a fundus camera is provided with two light sources and two barrier filters operating synchronously to produce and pass two different fluorescences thereby generating precisely superimposable angiographs to aid in aiming the laser.
REFERENCES:
patent: 3893447 (1975-07-01), Hochheimer et al.
patent: 5150292 (1992-09-01), Hoffmann et al.
patent: 5225859 (1993-07-01), Fleischman
patent: 5247318 (1993-09-01), Suzuki
patent: 5279298 (1994-01-01), Flower
patent: 5303709 (1994-04-01), Dreher et al.
Cooch Francis A.
Parsons David R.
Sikes William L.
The Johns Hopkins University
LandOfFree
Methods and apparatus for improved visualization of choroidal bl does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for improved visualization of choroidal bl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for improved visualization of choroidal bl will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-851640