Evidence map›Paper›PMID 31981300›Full record

ArticleActa ophthalmologica2020

High prevalence of myopia in children and their parents in Hong Kong Chinese Population: the Hong Kong Children Eye Study.

Jason C Yam, Shu Min Tang, Ka Wai Kam, Li Jia Chen, Marco Yu, Antony K Law, Benjamin H Yip, Yu Meng Wang, Carol Y L Cheung, Danny S C Ng and 3 more

Open access · bronzeAbstract read
PubMed Publisher
In one paragraph

Article in Acta ophthalmologica, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 85 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
85citing papers in PubMed, 3 pooled it
13.4field-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

85 citing papers in PubMed, 3 syntheses or guidelines pooled it, 139 citations in OpenAlex.

  1. Association Between Polymorphisms of 4 Common Genes and High Myopia Risk: A Comprehensive Analysis.Medical science monitor : international medical journal of experimental and clinical research · 2026
    Pooled it
  2. Pooled it
  3. Regional variations and temporal trends of childhood myopia prevalence in Africa: A systematic review and meta-analysis.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2022
    Pooled it
  4. Trial
  5. Trial
  6. Trial
  7. One-year results of the Variation of Orthokeratology Lens Treatment Zone (VOLTZ) Study: a prospective randomised clinical trial.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2021
    Trial
  8. Article
  9. Astigmatism Types Effects on Internal Astigmatism and Compensation in Children: Hong Kong Children Eye Study.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
    Article
  10. Axial Length to Corneal Curvature Ratio is Insufficient for Detecting Pseudomyopia in Children: A Multi-Cohort Study.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
    Article
  11. Efficacy of Multifocal Spectacles for Myopia Control in Pre-myopic Children: A Multicentre Real-world Study.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
    Article
  12. Article
  13. Observational
  14. Article
  15. Article
  16. Article
  17. Identifying and Managing Pre-Myopia: A Narrative Review.Clinical ophthalmology (Auckland, N.Z.) · 2026
    Review
  18. Article
  19. Article
  20. Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

13 authors at 2 institutions in 3 countries.

Jason C YamDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Shu Min TangDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.ORCID https://orcid.org/0000-0002-1265-0241
Ka Wai KamDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Li Jia ChenDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Marco YuDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Antony K LawDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Benjamin H YipThe Jockey Club School of Public Health and Primary Care Faculty of Medicine, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Yu Meng WangDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Carol Y L CheungDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.ORCID https://orcid.org/0000-0002-9672-1819
Danny S C NgDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Alvin L YoungDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Clement C ThamDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.ORCID https://orcid.org/0000-0003-4407-6907
Chi Pui PangDepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.
Chinese University of Hong Kong · HKFujian Medical University · CN

Funding

CUHK Jockey Club Children Eye Care ProgrammeDirect Grants of the Chinese University of Hong Kong 4054121Direct Grants of the Chinese University of Hong Kong 4054193Direct Grants of the Chinese University of Hong Kong 4054197Direct Grants of the Chinese University of Hong Kong 4054199General Research Fund (GRF), Research Grants Council, Hong Kong 14111515UBS Optimus Foundation Grant 8984
6 · The paper itself

Abstract

purposeTo determine the myopia prevalence in Hong Kong Chinese children and their parents.

methodsIt was a population-based cross-sectional study. A total of 4257 children aged 6-8 years, and 5880 parents were recruited in the Hong Kong Children Eye Study. Cycloplegic autorefraction was measured for children; and non-cycloplegic autorefraction for parents. Parental educational level, children's outdoor time, and near work were collected by validated questionnaires.

resultsIn children aged 6-8 years, 25.0% were myopic, and among them, 12.7% for the 6-year-olds, 24.4% for the 7-year-olds and 36.1% for the 8-year-old. About 0.7% of children aged 8 years were high myopia. In all age groups, boys (their myopia rate: 13.9% at 6 years, 26.7% at 7 years, and 38.3% at 8 years) were more myopic than girls (11.3% at 6 years, 22.0% at 7 years, 33.4% at 8 years). Among parents, 72.2% were myopic (mother, 73.2%; father, 70.7%) and 13.5% high myopia (mother, 12.8%; father, 14.5%). It was observed that prevalence decreased with ages and increased with education level.

conclusionThere is a strikingly high prevalence of myopia in Hong Kong children aged 6-8, much higher than that of other regions of China. Of note, the prevalence of children was similar to that in 15 years ago. Furthermore, the myopia prevalence of parents is high, and it had already increased in this cohort. Prevention of childhood myopia is important, likewise for visual complications from high myopia in adults.

Indexed as

adultschildrenhigh myopiamyopiaprevalencerefractive errors

Identifiers

PMID31981300
OpenAlexW3001727806

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.