Evidence map›Paper›PMID 34949911›Full record

ArticleClinical ophthalmology (Auckland, N.Z.)2021

Keratoconus and Visual Performance with Different Contact Lenses.

Ana Marta, João Heitor Marques, Daniel Almeida, Diana José, Irene Barbosa

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 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing 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

5 citing papers in PubMed.

  1. Article
  2. Article
  3. Intracorneal ring segment implantation for eyes with keratoconus and corneas thinner than 400 microns.Medical hypothesis, discovery & innovation ophthalmology journal · 2025
    Article
  4. Keratoconus: imaging modalities and management.Medical hypothesis, discovery & innovation ophthalmology journal · 2024
    Review
  5. Article
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.

Ana MartaDepartment of Ophthalmology, Centro Hospitalar Universitário do Porto (CHUPorto), Oporto, Portugal.ORCID 0000-0003-3495-4649
João Heitor MarquesDepartment of Ophthalmology, Centro Hospitalar Universitário do Porto (CHUPorto), Oporto, Portugal.ORCID 0000-0001-6487-7950
Daniel AlmeidaDepartment of Ophthalmology, Centro Hospitalar Universitário do Porto (CHUPorto), Oporto, Portugal.ORCID 0000-0001-6488-0949
Diana JoséDepartment of Ophthalmology, Centro Hospitalar Universitário do Porto (CHUPorto), Oporto, Portugal.ORCID 0000-0002-8415-0780
Irene BarbosaDepartment of Ophthalmology, Centro Hospitalar Universitário do Porto (CHUPorto), Oporto, Portugal.ORCID 0000-0001-6053-5339

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo analyze the visual performance in contact lens wearers with keratoconus.

methodsA retrospective study including contact lens (CL) wearers was performed. The current best-corrected visual acuity with contact lens (BCVA-CL) and with spectacles (BCVA-S) correction, contrast sensitivity (CS) (by Metrovision-MonPack3

resultsThis study included 96 eyes of 59 patients with Keratoconus. Rigid gas permeable contact lenses (RGPCL), hybrid contact lenses (HCL), and silicone hydrogel/hydrogel contact lenses (HGCL) were fitted in 67, 17, and 12 eyes, respectively. Dynamic objective scatter index (OSI) (p = 0.024), minimum OSI (p = 0.037) and maximum OSI (p = 0.040) were significantly better with RGPCL and worse with HGCL. Mean CS in photopic conditions was significantly worse with HGCL and better with HCL (p = 0.006), without differences in mesopic conditions (p = 0.121). RGPCL wearers showed a higher mean K (p = 0.020), and a lower corneal thickness at the thinnest point (p=0.011).

conclusionVisual quality varied significantly with different types of CL. Although RGPCL was fitted in patients with worse Pentacam tomographic parameters, RGPCL was associated with a better dynamic visual quality.

Indexed as

contact lenskeratoconusoptical qualityvisual performance

Identifiers

PMID34949911
PMCPMC8689658

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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.