Results 1 to 10 of about 57,579 (231)

Melanocytoma of the optic disk: A review. [PDF]

Indian J Ophthalmol, 2019
Melanocytoma is a deeply pigmented variant of melanocytic nevus that classically occurs in the optic disk, sometimes with contiguous involvement of the adjacent retina or choroid. Historically, this tumor was often confused with malignant melanoma both clinically and histopathologically.
Shields JA, Demirci H, Mashayekhi A, Eagle RC, Shields CL.   +4 more
europepmc   +7 more sources

Cataract and optic disk drusen in a patient with glycogenosis and di George syndrome: clinical and molecular report. [PDF]

BMC Ophthalmol, 2017
Background We report the ophthalmic findings of a patient with type Ia glycogen storage disease (GSD Ia), DiGeorge syndrome (DGS), cataract and optic nerve head drusen (ONHD).
Allegrini D, Penco S, Pece A, Autelitano A, Montesano G, Paci S, Montanari C, Maver A, Peterlin B, Damante G, Rossetti L.   +10 more
europepmc   +4 more sources

Optic nerve head segmentation [PDF]

, 2004
Reliable and efficient optic disk localization and segmentation are important tasks in automated retinal screening. General-purpose edge detection algorithms often fail to segment the optic disk due to fuzzy boundaries, inconsistent image contrast or ...
Basu, A., Fletcher, E., Hunter, Andrew, Kennedy, L., Lowell, J., Ryder, R., Steel, D.   +6 more
core   +1 more source

Experimental characterization of an uniaxial angle cut whispering gallery mode resonator [PDF]

, 2013
The usual configuration of uniaxial whispering gallery mode resonators is a disk shaped geometry where the optic axis points along the symmetry axis, a so called z-cut resonator.
Fürst, Josef U., Hauer, Martin, Leuchs, Gerd, Schwefel, Harald G. L., Sedlmeir, Florian   +4 more
core   +3 more sources

THE EXTENDED OPTICAL DISK OF M101 [PDF]

The Astrophysical Journal, 2012
We have used deep, wide-field optical imaging to study the faint outskirts of the luminous spiral galaxy M101 (NGC 5457), as well as its surrounding environment. Over six square degrees, our imaging has a limiting surface brightness of mu_B ~ 29.5 mag/arcsec^2, and has revealed the stellar structure of M101's disk out to nearly 25 arcminutes (50 kpc ...
Craig S. Rudick, Chelsea E. Spengler, John J. Feldmeier, Chris Mihos, Paul Harding   +4 more
openaire   +3 more sources

Connecting the Retina to the Brain [PDF]

, 2014
The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Work in the laboratory of LE is funded by the BBSRC [BB/J00815X/1] and the R.S. Macdonald Charitable Trust. Research in the
Erskine, Lynda, Herrera, Eloisa
core   +3 more sources

A GPU-based Evolution Strategy for Optic Disk Detection in Retinal Images [PDF]

, 2016
La ejecución paralela de aplicaciones usando unidades de procesamiento gráfico (gpu) ha ganado gran interés en la comunidad académica en los años recientes.
González-Calederón, Guillermo, Sánchez-Torres, Germán   +1 more
core   +2 more sources

Neuronal processing of translational optic flow in the visual system of the shore crab Carcinus maenas [PDF]

, 2011
This paper describes a search for neurones sensitive to optic flow in the visual system of the shore crab Carcinus maenas using a procedure developed from that of Krapp and Hengstenberg.
Bachmann, Barnes, Barnes, Barnes, Barnes, Barnes, Batschelet, Berón de Astrada, Berón de Astrada, Berón de Astrada, Blanke, Bremmer, Bush, Collett, Copello, Dacke, Dahmen, David, Eckert, Esch, Farina, Gibson, Gibson, Gibson, Glantz, Glantz, Glantz, Green, Götz, Haag, Haag, Hassenstein, Hausen, Hausen, Hausen, Hausen, Hemmi, Hemmi, Holmqvist, Horridge, Horridge, Hyslop, Johnson, Karmeier, Kern, Kern, Kirk, Kirk, Koenderink, Krapp, Krapp, Krapp, Krapp, Krapp, Land, Land, Land, Layne, Layne, Layne, Layne, Layne, Layne, Lindemann, Medan, Merkle, Nilsson, Oliva, Paolini, Paul, Paul, Pearson, Pfeiffer, Ronacher, Saito, Shafir, Simpson, Srinivasan, Srinivasan, Srinivasan, Stewart, Strausfeld, Sun, Sztarker, Sztarker, Sztarker, Tammero, Tanaka, Taylor, Tomsic, van den Berg, Wagner, Walls, Walls, Wang, Waterman, Wicklein, Wiersma, Wiersma, Wiersma, Wiersma, Wittlinger, Wittlinger, Wylie, York, Zeil, Zeil, Zeil   +107 more
core   +1 more source

Automated Fovea Detection Based on Unsupervised Retinal Vessel Segmentation Method [PDF]

, 2017
The Computer Assisted Diagnosis systems could save workloads and give objective diagnostic to ophthalmologists. At first level of automated screening of systems feature extraction is the fundamental step. One of these retinal features is the fovea.
Kalantari, Faraz, Kelley, Patrick, Nazar, Mahdieh, Tavakoli, Meysam   +3 more
core   +1 more source

Optical memory disks in optical information processing [PDF]

Applied Optics, 1990
We describe the use of optical memory disks as elements in optical information processing architectures. The optical disk is an optical memory device with a storage capacity approaching 10(10) bits which is naturally suited to parallel access. We discuss optical disk characteristics which are important in optical computing systems such as contrast ...
Psaltis, Demetri, Neifeld, Mark A., Yamamura, Alan, Kobayashi, Seiji   +3 more
openaire   +5 more sources