Background: To examine the effect of optic disc area on peripapillary RNFLT (retinal nerve fiber layer thickness) measurement at circle diameter of 3.4 mm around optic nerve head using spectral OCT/SLO (Optical coherence tomography/scanning laser ophthalmoscope). Materials and Methods : In this prospective, cross sectional study, one hundred and two eyes of 102 normal subjects underwent RNFLT and disc area measurement using spectral OCT/SLO. Based on disc area, subjects were divided into three groups i.e., <3 mm 2 (32 eyes), 3-4 mm 2 (36 eyes) and >4 mm 2 (34 eyes). The effect of disc area ...
It is feasible to bring the currently most used examination method in ophthalmology, optical coherence tomography (OCT), into ophthalmic surgery to enhance information and control for the surgeon and increase outcome for the patient. In this overview, the currently commercially available OCT devices intending intra-operative OCT imaging are described. Further experience with these systems might not only aid in solving current problems but also open our minds to detect processes so far unknown and help answer questions so far unaddressed.
A scanning laser ophthalmoscope (SLO) for imaging the retina of an eye comprises a source (12) of collimated light, a scanning device (14, 16, 1328, 1319), a scan transfer device (20) and a detector (1310). The scan transfer device has a first focus (16) at which an apparent point source is provided and a second focus (24) at which an eye (524, 1324) may be accommodated. The scan transfer device transfers a two-dimensional collimated light scan from the apparent point source into the eye. An optical coherence tomography (OCT) system (900) is combined with the SLO, the OCT system providing ...
We report the design, manufacture and assessment of a phantom eye that can be used to measure the performance and accuracy of ophthalmic-OCT devices. We base our design on a wide-field schematic eye, R. Navarro, J. Opt. Soc. Am. A 2 (1985), to allow the assessment of device performance relative to ± 70° external field of view. We have fabricated the phantom eye and have verified the structural dimensions of the multi-material 3D-printed retinal targets using calibrated-OCT images.
Purpose : This study was performed to compare the positive predictive value of peripapillary retinal nerve fiber layer (RNFL) thickness measurements obtained using Cirrus high-definition optical coherence tomography (Cirrus HD-OCT; Carl Zeiss Meditec, Dublin, CA) and spectral OCT/scanning laser ophthalmoscopy (SLO) (OPKO/OTI, Miami, FL) in the diagnosis of glaucoma. Methods : A total of 50 eyes of 50 healthy subjects and 60 eyes of 60 subjects with glaucoma were included. All participants underwent RNFL thickness measurement using Cirrus HD-OCT and spectral OCT/SLO on the same day. Average, quadrant, clock-hour RNFL thicknesses, area under the receiver operating characteristic curve (AUC ...
Purpose To identify the unique pathologic findings of retinal angiomatous proliferation (RAP) in optical coherence tomography (OCT). Methods Retrospectively, 29 eyes of 25 patients with age-related macular degeneration and complicated RAP were analyzed. All 29 eyes had choroidal neovascularization (CNV) in the area of pigment epithelial detachment (PED) or adjacent to it, which was visible with fluorescein angiography or indocyanine green angiography. Cross-sectional images were obtained by OCT scanning through the CNV lesions. Results Six distinctive findings of OCT included drusen (100%), inner retinal cyst (80%), outer retinal cyst (68%), fibrovascular PED (84%), serous retinal detachment (40%), and PED (68 ...
A method of performing spectral OCT imaging on a target involves repeatedly scanning said target along a transverse scanning line with an object beam derived from an OCT interferometer having a narrowband source. The wavelength of the narrowband source is modulated over a range of wavelengths at a rate that is slow relative to the rate of scanning the target. The object beam returned from the target is detected to produce a set of data obtained from multiple scans along said scanning line over the entire range of wavelengths. The data is then processed to extract an OCT image (typically ...
A diagnostic method is disclosed wherein the potential preserved visual acuity in the retina of a patient is determined from the amount of tissue connecting the inner and outer plexiform layers remaining in the retina.
Optos is an innovative retinal imaging company with a vision to be recognised as the leading provider of retinal diagnostics. Optos designs, develops, manufactures and markets retinal imaging devices that create optomap images. Ophthalmic Technologies Incorporated was acquired by Optos in September 2011 from OPKO Health which acquired it in November 2007. Ophthalmic Technologies Inc. is dedicated to providing technologically advanced, easy-to-use equipment for ophthalmology. Offering innovative systems, with advanced imaging capabilities, OTI provides tools that meet the needs of ophthalmologists and surgeons worldwide. A new Optical Coherence Tomography system for the posterior segment was added to OTI's product line in 2005. OTI's head office is located in Toronto, Ontario, with its Research and Development branch office in Kingston, Ontario.
It's an exciting time for Optos. We've turned the company around and now have exciting growth prospects. There are a limited number of companies - mainly in Germany and Japan - working in the field of OCT...We wouldn't rule out either buying or licensing the technology but we won't be developing it from scratch.Roy Davis in Optos on the Hunt for OCT Technology.
“In addition, we will add an existing revenue stream with immediate cross selling synergies through Optos’ sizeable salesforce as well as future margin improvement through operational synergies. We believe these current and future products and business will make Optos a more robust player in the ophthalmology market...We are also delighted to have secured the support of Lloyds Bank Corporate Markets who have extended a $30m revolving credit facility to Optos to support this transaction and our operations going forward.Roy Davis in Proposed Acquisition of the OCT and ultrasound business and assets of OPKO Health, Inc.
We believe that the instrumentation business and OCT SLO technology have strong potential that will benefit greatly from the synergies provided as part of a large and successful ophthalmic focused instrumentation company; we have great confidence that our instrumentation business will grow and prosper as part of Optos.Phillip Frost in OPKO Announces Sale of Ophthalmic Instrumentation Business