Evidence map›Paper›PMID 34465977›Full record

ArticleClinical ophthalmology (Auckland, N.Z.)2021

Characteristics of Corneal Subbasal Nerves in Different Age Groups: An in vivo Confocal Microscopic Analysis.

Chareenun Chirapapaisan, Sittiphong Thongsuwan, Niphon Chirapapaisan, Pratuangsri Chonpimai, Anupong Veeraburinon

Abstract read
In one paragraph

Article in Clinical ophthalmology (Auckland, N.Z.), 2021. 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
–field-weighted citation impact
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.

  1. Article
  2. Article
  3. Article
  4. Trigger Factors in Recurrent Corneal Erosion Syndrome.Journal of clinical medicine · 2025
    Article
  5. Article
  6. Review
  7. Article
  8. Subclinical corneal inflammation and subbasal nerve alterations in keratoconus detected by in vivo confocal microscopy: a cross-sectional study.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025
    Article
  9. Article
  10. Article
  11. Review
  12. Review
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.

Chareenun ChirapapaisanDepartment of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.ORCID 0000-0001-6560-9595
Sittiphong ThongsuwanDepartment of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Niphon ChirapapaisanDepartment of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Pratuangsri ChonpimaiDepartment of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Anupong VeeraburinonResearch Division, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailanda.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo determine the normative characteristics of corneal subbasal nerves in different age groups using laser scanning in vivo confocal microscopy (IVCM). PATIENTS AND

methodsThis descriptive observational study recruited healthy subjects (aged 20-60 years) from Siriraj Health-Screening Center. Excluded were individuals who had abnormal ocular symptoms, previous ocular surgery, a history of any diseases related to systemic and/or corneal neuropathy, or abnormal corneal sensitivity. Corneal IVCM (HRT3/Rostock Corneal Module) was performed at the central cornea to analyze the subbasal nerve plexus. The corneal nerve characteristics, comprising the number and density of nerves (main nerve trunks, branches, and total nerves) were analyzed using the NeuronJ program, and the corneal nerve tortuosity was graded. The correlations between the subbasal nerve density, tortuosity and age were then analyzed.

resultsEighty subjects were enrolled, with twenty in each of four age groups (20-30, >30-40, >40-50, and >50-60 years). Overall, the mean number and density of main nerve trunks were 27.93±0.81/mm

conclusionThe corneal subbasal nerve numbers and densities were not significantly different among a healthy population aged 20-60 years. However, there was a trend towards high tortuosity of the corneal nerve in people aged over 40 years.

Indexed as

agecorneal subbasal nervesin vivo confocal microscopyIVCMnormal characteristics

Identifiers

PMID34465977
PMCPMC8403225

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