Evidence map›Paper›PMID 34859311›Full record

ArticleInternational ophthalmology2022

Investigation of the pathophysiology of the retina and choroid in Parkinson's disease by optical coherence tomography.

Yasuaki Kamata, Naoto Hara, Tsukasa Satou, Takahiro Niida, Kazuo Mukuno

Open access · hybridAbstract read
In one paragraph

Article in International ophthalmology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
0.6field-weighted citation impact, top 32% 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

7 citing papers in PubMed, 14 citations in OpenAlex.

  1. Review
  2. Retinal Neurovascular Signatures in Parkinson's Disease.Investigative ophthalmology & visual science · 2025
    Article
  3. Article
  4. Review
  5. Article
  6. Article
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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 2 institutions in 1 country.

Yasuaki KamataDepartment of Orthoptics and Visual Sciences, School of Health Sciences, International University of Health and Welfare, 2600-1, Kitakanemaru, Ohtawara, Tochigi, 324-8501, Japan. kamata@iuhw.ac.jp.ORCID http://orcid.org/0000-0002-5267-5849
Naoto HaraDepartment of Orthoptics and Visual Sciences, School of Health Sciences, International University of Health and Welfare, 2600-1, Kitakanemaru, Ohtawara, Tochigi, 324-8501, Japan.
Tsukasa SatouDepartment of Orthoptics and Visual Sciences, School of Health Sciences, International University of Health and Welfare, 2600-1, Kitakanemaru, Ohtawara, Tochigi, 324-8501, Japan.
Takahiro NiidaDepartment of Orthoptics and Visual Sciences, School of Health Sciences, International University of Health and Welfare, 2600-1, Kitakanemaru, Ohtawara, Tochigi, 324-8501, Japan.
Kazuo MukunoDepartment of Ophthalmology, Yokohama Clinic of Kanagawa Dental University, Yokohama, Kanagawa, Japan.
International University of Health and Welfare · JPKanagawa Dental University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe pathology of Parkinson's disease (PD) is suspected to affect the retina and choroid. We investigated changes in the retina and choroid of patients with PD using optical coherence tomography.

methodsWe examined 14 patients with PD and 22 patients without PD. Patients without PD had no ophthalmic disease other than cataracts. In addition, it was also confirmed that there was no neurodegenerative disease. The retinal nerve fiber layer, ganglion cell layer + inner plexiform layer, and choroidal thickness were compared between both groups. Additionally, the choroidal image was divided into the choroid area, luminal area, and interstitial area using the binarization method, and the area of each region and the percentage of luminal area in the choroid area were analyzed.

resultsPatients with PD had a significantly thinner ganglion cell layer + inner plexiform layer compared to those without PD. The choroid area, luminal area, and interstitial area were significantly decreased in patients with PD compared to those without PD. Seven patients with PD who were successfully followed up showed decreased retinal nerve fiber layer and interstitial area after 3 years.

conclusionAutonomic nervous disorders and neurodegeneration in PD can cause thinning of the retina and choroid, as well as a reduction in the choroid area.

Indexed as

Parkinson DiseaseTomography, Optical CoherenceChoroidCross-Sectional StudiesHumansRetinaChoroidOptical coherence tomographyParkinson’s diseaseRetina

Identifiers

PMID34859311
PMCPMC9122847
OpenAlexW3215890482

What OpenQuestion holds

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Registered trials

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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.