Evidence map›Paper›PMID 33951213›Full record

Trial reportOphthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)2021

Axial length targets for myopia control.

Paul Chamberlain, Percy Lazon de la Jara, Baskar Arumugam, Mark A Bullimore

Open access · hybridAbstract readComparative StudyRandomized Controlled Trial
In one paragraph

Trial report in Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
71citing papers in PubMed, 2 pooled it
13.7field-weighted citation impact, top 1% 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

71 citing papers in PubMed, 2 syntheses or guidelines pooled it, 128 citations in OpenAlex.

  1. Pooled it
  2. Myopia and Near Work: A Systematic Review and Meta-Analysis.International journal of environmental research and public health · 2023
    Pooled it
  3. Trial
  4. Trial
  5. Trial
  6. Trial
  7. Short-term tear film stability, optical quality and visual performance in two dual-focus contact lenses for myopia control with different optical designs.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2022
    Trial
  8. Axial length targets for myopia control.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2021
    Trial
  9. Article
  10. Early Axial Length Response Predicts Long-Term Myopia Control in Children Undergoing Orthokeratology.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
    Article
  11. Article
  12. Article
  13. Article
  14. Efficacy and safety of different atropine regimens: MOSAIC2.Annals of translational medicine · 2026
    Article
  15. Article
  16. Article
  17. Corrected Percentile Curves to Track Myopisation-The Anyang Childhood Eye Study.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
    Article
  18. Article
  19. Identifying and Managing Pre-Myopia: A Narrative Review.Clinical ophthalmology (Auckland, N.Z.) · 2026
    Review
  20. Article

11 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

Paul ChamberlainCooperVision Inc., Pleasanton, USA.
Percy Lazon de la JaraCooperVision Inc., Pleasanton, USA.
Baskar ArumugamCooperVision Inc., Pleasanton, USA.
Mark A BullimoreCollege of Optometry, University of Houston, Houston, USA.ORCID 0000-0002-6315-3720
BioInVision (United States) · USUniversity of Houston · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeBoth emmetropic and myopic eyes elongate throughout childhood. The goals of this study were to compare axial elongation among untreated progressing myopes, progressing myopes treated with a myopia control contact lens and emmetropes, in order to place axial elongation in the context of normal eye growth in emmetropic children, and to consider whether normal physiological eye growth places limits on what might be achieved with myopia control.

methodsAxial elongation data were taken from the 3-year randomised clinical trial of a myopia control dual-focus (MiSight® 1 day) contact lens. These were compared with data for myopic and emmetropic children in two large cohort studies: the Orinda Longitudinal Study of Myopia (OLSM) and the Singapore Cohort Study of the Risk Factors for Myopia (SCORM). Each study's published equations were used to calculate annual axial elongation. Four virtual cohorts-myopic and emmetropic for each model-were created, each with the same age distribution as the MiSight clinical trial subjects and the predicted cumulative elongation calculated at years 1, 2 and 3 for myopes and emmetropes using both the OLSM and SCORM models.

resultsThe untreated control myopes in the MiSight clinical trial showed mean axial elongation over 3 years (0.62 mm) similar to the virtual cohorts based on the OLSM (0.70 mm) and SCORM (0.65 mm) models. The predicted 3-year axial elongation for the virtual cohorts of emmetropes was 0.24 mm for both the OLSM and SCORM models-similar to the mean 3-year elongation in MiSight-treated myopes (0.30 mm).

conclusionsThe 3-year elongation in MiSight-treated myopes approached that of virtual cohorts of emmetropes with the same age distribution. It is hypothesised that myopic axial elongation is superimposed on an underlying physiological axial elongation observed in emmetropic eyes, which reflects increases in body stature. We speculate that optically based myopia control treatments may minimise the myopic axial elongation but retain the underlying physiological elongation observed in emmetropic eyes.

Indexed as

Disease ManagementAdolescentAxial Length, EyeChildFemaleFollow-Up StudiesHumansMaleMyopiaTime Factorsaxial lengthchildrencontact lensesmyopiamyopia control

Identifiers

PMID33951213
PMCPMC8252804
OpenAlexW3159408657

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.