Evidence map›Paper›PMID 27956294›Full record

ArticleJournal of cataract and refractive surgery2016

Nonlinear optical corneal collagen crosslinking of ex vivo rabbit eyes.

Samantha M Bradford, Donald J Brown, Tibor Juhasz, Eric Mikula, James V Jester

Open access · greenAbstract read
In one paragraph

Article in Journal of cataract and refractive surgery, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.7field-weighted citation impact, top 15% 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

12 citing papers in PubMed, 19 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Samantha M BradfordFrom the Department of Biomedical Engineering (Bradford, Brown, Juhasz, Jester) and the Department of Ophthalmology (Brown, Juhasz, Mikula, Jester), University of California, Irvine, California, USA.
Donald J BrownFrom the Department of Biomedical Engineering (Bradford, Brown, Juhasz, Jester) and the Department of Ophthalmology (Brown, Juhasz, Mikula, Jester), University of California, Irvine, California, USA.
Tibor JuhaszFrom the Department of Biomedical Engineering (Bradford, Brown, Juhasz, Jester) and the Department of Ophthalmology (Brown, Juhasz, Mikula, Jester), University of California, Irvine, California, USA.
Eric MikulaFrom the Department of Biomedical Engineering (Bradford, Brown, Juhasz, Jester) and the Department of Ophthalmology (Brown, Juhasz, Mikula, Jester), University of California, Irvine, California, USA.
James V JesterFrom the Department of Biomedical Engineering (Bradford, Brown, Juhasz, Jester) and the Department of Ophthalmology (Brown, Juhasz, Mikula, Jester), University of California, Irvine, California, USA. Electronic address: jjester@uci.edu.
Jean Brown Research · US

Funding

Non-linear Optical Collagen Cross-linking (NLO CXL) for Treatment of Keratoconus.R01EY024600 · NEI · UNIVERSITY OF CALIFORNIA-IRVINE · PI JESTER, JAMES V · 2014 to 2024
$3.1M
NEI NIH HHS R01 EY024600
6 · The paper itself

Abstract

purposeTo determine whether riboflavin-induced collagen crosslinking (CXL) could be precisely achieved in the corneal stroma of ex vivo rabbit eyes using nonlinear optical excitation with a low numerical aperture lens and enlarged focal volume.

settingGavin Herbert Eye Institute, University of California Irvine, Irvine, California, USA.

designExperimental study.

methodsThe corneal epithelium was removed and the corneas were soaked in 0.5% riboflavin solution. Using a 0.1 numerical aperture objective, a theoretical excitation volume of 150 μm × 3 μm was generated using 1 W of 760 nm femtosecond laser light and raster scanned with 4.4 μm line separation at varying effective speeds over a 4.50 mm × 2.25 mm area. Corneal sections were examined for collagen autofluorescence.

resultsCollagen autofluorescence was enhanced 2.9 times compared with ultraviolet-A (UVA) CXL. Also, increasing speed was linearly associated with decreasing autofluorescence intensity. The slowest speed of 2.69 mm/s showed a mean of 182.97 μm ± 52.35 (SD) long autofluorescent scan lines axially in the central cornea compared with 147.84 ± 4.35 μm for UVA CXL.

conclusionsDecreasing dwell time was linearly associated with decreasing autofluorescence intensity, approaching that of UVA CXL at a speed of 8.9 mm/s. Using an effective speed of 8.9 mm/s, nonlinear optical CXL could be achieved over a 3.0 mm diameter area in fewer than 4 minutes. Further development of nonlinear optical CXL might result in safer, faster, and more effective CXL treatments. FINANCIAL DISCLOSURE: None of the authors has a financial or proprietary interest in any material or method mentioned.

Indexed as

AnimalsCollagenCorneaCorneal StromaCross-Linking ReagentsPhotosensitizing AgentsRabbitsRiboflavinUltraviolet RaysCollagenCross-Linking ReagentsPhotosensitizing AgentsRiboflavin

Identifiers

PMID27956294
PMCPMC5914516
OpenAlexW2560487104

What OpenQuestion holds

Textmetadata
LicenceTDM
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.