Evidence map›Paper›PMID 33782847›Full record

ArticleInternational ophthalmology2021

Effect of trabeculectomy on optic nerve head and macular vessel density: an optical coherence tomography angiography study.

Arezoo Miraftabi, Samira Jafari, Naveed Nilforushan, Parya Abdolalizadeh, Reza Rakhshan

Abstract read
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In one paragraph

Article in International ophthalmology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 11% 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 18 citations in OpenAlex.

  1. Pooled it
  2. Optical coherence tomography angiography of the macular retina and choroid in glaucoma: a narrative review.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
    Review
  3. Article
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  7. Investigation of the effects of single and two-muscle horizontal rectus surgeries on macular microvasculature.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025
    Article
  8. Article
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  13. Article
  14. The impact of intraocular pressure on optical coherence tomography angiography: A review of current evidence.Saudi journal of ophthalmology : official journal of the Saudi Ophthalmological Society
    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 at 1 institution in 1 country.

Arezoo MiraftabiEye and Skull Base Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Sattarkhan Niayesh St., Tehran, Iran. miraftabi.a@iums.ac.ir.ORCID http://orcid.org/0000-0001-9870-8856
Samira JafariEye and Skull Base Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Sattarkhan Niayesh St., Tehran, Iran.
Naveed NilforushanEye and Skull Base Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Sattarkhan Niayesh St., Tehran, Iran.
Parya AbdolalizadehEye and Skull Base Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Sattarkhan Niayesh St., Tehran, Iran.
Reza RakhshanEye and Skull Base Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Sattarkhan Niayesh St., Tehran, Iran.
Iran University of Medical Sciences · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo investigate the effect of trabeculectomy on peripapillary and macular vessel density (VD) using optical coherence tomography angiography (OCT-A) in patients with primary open-angle glaucoma.

methodsThis is a prospective, interventional study on 32 glaucoma eyes (21 patients) who underwent trabeculectomy. Optic nerve head (ONH) and macular structural and OCT-A scans were performed before surgery and at one and six months postoperatively with the Avanti device (AngioVue System, Optovue Inc., Fremont, CA). The primary outcomes of interest were changes in global and regional peripapillary and macular VD.

resultsThe average (standard deviation) age and visual field mean deviation of the sample were 58.9(9.9) years and -14.5(9.0) dB, respectively. The average (standard deviation) baseline intraocular pressure significantly decreased from 24.5(10.4) mmHg to 9.6(2.1) mmHg, 6 months after the surgery (P< 0.001). The mean (standard deviation) whole image VD of ONH had increased from 37.6(8.3)% to 40.5(9.1)% at 6 months after the surgery (P = 0.01) while its changes were not significant at month 1 (38.1(9.5)%, P = 0.64). The average of radial peripapillary circle (RPC) VD increased from 36.5(10.3)% to 39.3(10.8)% at 6 months (P = 0.04) compared to 1-month post-trabeculectomy (37.0(11.4)%, P = 0.71). Similar patterns at postoperative months 1 and 6 were also observed in RPC VD at superior and inferior hemifields as well as nasal and temporal quadrants. The observed changes in VD of macular, foveal, peri-, and parafoveal were not significant at superficial or deep slabs at 1 and 6 months after trabeculectomy (all P values > 0.05).

conclusionOur study demonstrated significant improvements in peripapillary vessel density at 6-month following trabeculectomy.

Indexed as

Glaucoma, Open-AngleOptic DiskTrabeculectomyFluorescein AngiographyHumansIntraocular PressureProspective StudiesRetinal VesselsTomography, Optical CoherenceGlaucomaMaculaOCT angiographyPeripapillaryTrabeculectomyVessel density

Identifiers

PMID33782847
OpenAlexW3140516836

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.