Evidence map›Paper›PMID 25324288›Full record

ArticleInvestigative ophthalmology & visual science2014

The cellular origins of the outer retinal bands in optical coherence tomography images.

Ravi S Jonnal, Omer P Kocaoglu, Robert J Zawadzki, Sang-Hyuck Lee, John S Werner, Donald T Miller

Open access · bronzeAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 121 papers.

0numbers the graph read from it
0cells of the map it votes in
121citing papers in PubMed
9.8field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

121 citing papers in PubMed, 175 citations in OpenAlex.

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61 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Ravi S JonnalVision Science and Advanced Retinal Imaging Laboratory, University of California, Davis Eye Center, Sacramento, California, United States.
Omer P KocaogluSchool of Optometry, Indiana University, Bloomington, Indiana, United States.
Robert J ZawadzkiVision Science and Advanced Retinal Imaging Laboratory, University of California, Davis Eye Center, Sacramento, California, United States.
Sang-Hyuck LeeVision Science and Advanced Retinal Imaging Laboratory, University of California, Davis Eye Center, Sacramento, California, United States.
John S WernerVision Science and Advanced Retinal Imaging Laboratory, University of California, Davis Eye Center, Sacramento, California, United States.
Donald T MillerSchool of Optometry, Indiana University, Bloomington, Indiana, United States.
University of California, Davis · USIndiana University Bloomington · US

Funding

VISION RESEARCH CORE GRANTP30EY012576 · NEI · UNIVERSITY OF CALIFORNIA DAVIS · PI LISA M OAKES · 1999 to 2026
$18.9M
Optical Imaging of the Photoreceptor-RPE ComplexR01EY018339 · NEI · TRUSTEES OF INDIANA UNIVERSITY · PI MILLER, DONALD T · 2007 to 2025
$7.7M
Structure and Function of the Chorioretinal Complex in Age-Related Macular DegeneR01EY024239 · NEI · UNIVERSITY OF CALIFORNIA AT DAVIS · PI WERNER, JOHN S · 2014 to 2018
$2.4M
Core Support for Vision Research at Indiana UniversityP30EY019008 · NEI · TRUSTEES OF INDIANA UNIVERSITY · PI BURNS, STEPHEN A · 2009 to 2013
$2.1M
OPTICAL &NEURAL CHANGES IN THE AGING VISUAL SYSTEMR01AG004058 · NIA · UNIVERSITY OF COLORADO AT BOULDER · PI WERNER, JOHN S · 1988 to 2015
$1.9M
NEI NIH HHS P30 EY012576NEI NIH HHS P30 EY019008NEI NIH HHS R01 EY018339NEI NIH HHS R01 EY024239NIA NIH HHS R01 AG004058
6 · The paper itself

Abstract

purposeTo test the recently proposed hypothesis that the second outer retinal band, observed in clinical OCT images, originates from the inner segment ellipsoid, by measuring: (1) the thickness of this band within single cone photoreceptors, and (2) its respective distance from the putative external limiting membrane (band 1) and cone outer segment tips (band 3).

methodsAdaptive optics-optical coherence tomography images were acquired from four subjects without known retinal disease. Images were obtained at foveal (2°) and perifoveal (5°) locations. Cone photoreceptors (n = 9593) were identified and segmented in three dimensions using custom software. Features corresponding to bands 1, 2, and 3 were automatically identified. The thickness of band 2 was assessed in each cell by fitting the longitudinal reflectance profile of the band with a Gaussian function. Distances between bands 1 and 2, and between 2 and 3, respectively, were also measured in each cell. Two independent calibration techniques were employed to determine the depth scale (physical length per pixel) of the imaging system.

resultsWhen resolved within single cells, the thickness of band 2 is a factor of three to four times narrower than in corresponding clinical OCT images. The distribution of band 2 thickness across subjects and eccentricities had a modal value of 4.7 μm, with 48% of the cones falling between 4.1 and 5.2 μm. No significant differences were found between cells in the fovea and perifovea. The distance separating bands 1 and 2 was found to be larger than the distance between bands 2 and 3, across subjects and eccentricities, with a significantly larger difference at 5° than 2°.

conclusionsOn the basis of these findings, we suggest that ascription of the outer retinal band 2 to the inner segment ellipsoid is unjustified, because the ellipsoid is both too thick and proximally located to produce the band.

Indexed as

Diagnostic Techniques, OphthalmologicalTomography, Optical CoherenceBasement MembraneHumansModels, AnatomicRetinaRetinal Cone Photoreceptor CellsRetinal Photoreceptor Cell Inner SegmentRetinal Photoreceptor Cell Outer Segmentadaptive opticsmorphometrynomenclatureoptical coherence tomographyphotoreceptor morphology

Identifiers

PMID25324288
PMCPMC4261632
OpenAlexW2318697049

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.