Subtopic Deep Dive
Orthokeratology for Refractive Error
Research Guide
What is Orthokeratology for Refractive Error?
Orthokeratology uses overnight rigid contact lenses to temporarily reshape the cornea, correcting refractive errors and slowing myopia progression in children.
Studies demonstrate orthokeratology reduces axial length elongation compared to spectacles over 5 years (Hiraoka et al., 2012, 466 citations). Research includes randomized trials and follow-ups measuring efficacy, safety, and biometric changes (Santodomingo-Rubido et al., 2012, 323 citations). Approximately 20 key papers from 2011-2021 focus on interventions like orthokeratology for myopia control.
Why It Matters
Orthokeratology offers non-surgical myopia control for pediatric patients, reducing axial elongation by 43% over 5 years versus spectacles (Hiraoka et al., 2012). It addresses rising myopia prevalence, projected to affect 50% globally by 2050, preventing complications like myopic maculopathy (Wildsoet et al., 2019). Real-world applications include clinical protocols in Asia and Europe, with adherence studies improving long-term outcomes (Swarbrick et al., 2014).
Key Research Challenges
Long-term Safety Monitoring
Orthokeratology requires tracking corneal health over years due to risks like microbial keratitis. Studies note 7.7% adverse event rates in children (Hiraoka et al., 2012). Long-term data beyond 5 years remains limited (Swarbrick et al., 2014).
Patient Adherence Variability
Overnight lens wear demands high compliance, with dropout rates up to 20% in trials. Factors include discomfort and parental supervision needs (Santodomingo-Rubido et al., 2012). Adherence impacts efficacy measurements in biometric studies.
Efficacy Across Populations
Myopia slowing varies by age, baseline refraction, and ethnicity, complicating generalizations. Asian cohorts show stronger effects than others (Hiraoka et al., 2012). Comparative trials against alternatives like DIMS lenses are needed (Lam et al., 2019).
Essential Papers
Time spent in outdoor activities in relation to myopia prevention and control: a meta‐analysis and systematic review
Shuyu Xiong, Padmaja Sankaridurg, Thomas Naduvilath et al. · 2017 · Acta Ophthalmologica · 575 citations
Abstract Outdoor time is considered to reduce the risk of developing myopia. The purpose is to evaluate the evidence for association between time outdoors and (1) risk of onset of myopia (incident/...
Defocus Incorporated Multiple Segments (DIMS) spectacle lenses slow myopia progression: a 2-year randomised clinical trial
Carly Siu Yin Lam, Wing Chun Tang, Dennis Y. Tse et al. · 2019 · British Journal of Ophthalmology · 504 citations
Aim To determine if ‘Defocus Incorporated Multiple Segments’ (DIMS) spectacle lenses slow childhood myopia progression. Methods A 2-year double-masked randomised controlled trial was carried out in...
Progression of Myopia in School-Aged Children After COVID-19 Home Confinement
Jiaxing Wang, Ying Li, David C. Musch et al. · 2021 · JAMA Ophthalmology · 479 citations
This cross-sectional study compares the prevalence of myopia in school-aged children 5 years before the COVID-19 pandemic with the prevalence during home confinement due to the pandemic.
Scleral hypoxia is a target for myopia control
Hao Wu, Wei Chen, Fei Zhao et al. · 2018 · Proceedings of the National Academy of Sciences · 474 citations
Significance Myopia is the leading cause of visual impairment. Myopic eyes are characterized by scleral extracellular matrix (ECM) remodeling, but the initiators and signaling pathways underlying s...
Long-Term Effect of Overnight Orthokeratology on Axial Length Elongation in Childhood Myopia: A 5-Year Follow-Up Study
Takahiro Hiraoka, Tetsuhiko Kakita, Fumiki Okamoto et al. · 2012 · Investigative Ophthalmology & Visual Science · 466 citations
Our prospective study was conducted to compare axial length elongation in myopic children receiving long-term overnight orthokeratology (OK) treatment to those wearing spectacles as controls.There ...
IMI – Interventions for Controlling Myopia Onset and Progression Report
Christine F. Wildsoet, Audrey Chia, Pauline Cho et al. · 2019 · Investigative Ophthalmology & Visual Science · 421 citations
Myopia has been predicted to affect approximately 50% of the world's population based on trending myopia prevalence figures. Critical to minimizing the associated adverse visual consequences of com...
IMI Prevention of Myopia and Its Progression
Jost B. Jonas, Marcus Ang, Pauline Cho et al. · 2021 · Investigative Ophthalmology & Visual Science · 391 citations
The prevalence of myopia has markedly increased in East and Southeast Asia, and pathologic consequences of myopia, including myopic maculopathy and high myopia-associated optic neuropathy, are now ...
Reading Guide
Foundational Papers
Start with Hiraoka et al. (2012, 466 citations) for 5-year axial elongation data establishing core efficacy; Santodomingo-Rubido et al. (2012, 323 citations) for biometric changes; Swarbrick et al. (2014) for study designs.
Recent Advances
Study Wildsoet et al. (2019, IMI report) for intervention summaries; Jonas et al. (2021) for prevention strategies integrating OK; Wang et al. (2021) on COVID impacts relevant to progression control.
Core Methods
Core techniques include overnight rigid lens wear for corneal molding, axial length measurement via optical biometry, and randomized controlled trials comparing to spectacles (Hiraoka et al., 2012).
How PapersFlow Helps You Research Orthokeratology for Refractive Error
Discover & Search
PapersFlow's Research Agent uses searchPapers and citationGraph to map orthokeratology literature from Hiraoka et al. (2012, 466 citations), revealing 50+ connected papers on myopia control. exaSearch uncovers meta-analyses like Xiong et al. (2017), while findSimilarPapers links to Santodomingo-Rubido et al. (2012) for biometric comparisons.
Analyze & Verify
Analysis Agent employs readPaperContent on Hiraoka et al. (2012) to extract axial elongation data (43% reduction), then runPythonAnalysis with pandas to meta-analyze progression rates across 5 trials. verifyResponse via CoVe checks claims against raw abstracts, and GRADE grading scores intervention evidence as moderate for long-term efficacy.
Synthesize & Write
Synthesis Agent detects gaps in adherence data post-2014 via contradiction flagging between Swarbrick et al. (2014) and recent reviews. Writing Agent uses latexEditText, latexSyncCitations for Hiraoka (2012), and latexCompile to generate trial comparison tables; exportMermaid visualizes intervention flows like OK vs. spectacles.
Use Cases
"Run meta-analysis on axial elongation rates in orthokeratology trials for children under 12."
Research Agent → searchPapers('orthokeratology axial elongation') → Analysis Agent → runPythonAnalysis(pandas meta-analysis on Hiraoka 2012 + Santodomingo-Rubido 2012 data) → CSV export of pooled effect sizes (OR=0.57).
"Draft LaTeX review section comparing OK to DIMS lenses for myopia control."
Synthesis Agent → gap detection (Lam 2019 vs Hiraoka 2012) → Writing Agent → latexEditText + latexSyncCitations(10 papers) → latexCompile → PDF with GRADE-scored evidence table.
"Find code for simulating corneal reshaping in orthokeratology models."
Research Agent → paperExtractUrls('orthokeratology simulation') → Code Discovery → paperFindGithubRepo → githubRepoInspect → Python script for finite element corneal model.
Automated Workflows
Deep Research workflow conducts systematic reviews of 50+ myopia papers, chaining searchPapers → citationGraph → GRADE grading, outputting structured reports on orthokeratology efficacy (e.g., Hiraoka 2012). DeepScan's 7-step analysis verifies biometric claims from Swarbrick (2014) with CoVe checkpoints and runPythonAnalysis. Theorizer generates hypotheses on OK combined with outdoor time from Xiong (2017).
Frequently Asked Questions
What is orthokeratology for refractive error?
Orthokeratology involves overnight rigid lens wear to reshape the cornea, correcting myopia and slowing progression (Hiraoka et al., 2012).
What methods prove orthokeratology efficacy?
5-year prospective studies show 43% reduced axial elongation vs. spectacles using biometry and refraction tracking (Hiraoka et al., 2012; Santodomingo-Rubido et al., 2012).
What are key papers on orthokeratology?
Hiraoka et al. (2012, 466 citations) on 5-year effects; Swarbrick et al. (2014, 256 citations) on novel designs; Santodomingo-Rubido et al. (2012, 323 citations) on Spanish cohorts.
What open problems exist in orthokeratology research?
Long-term safety beyond 5 years, adherence optimization, and efficacy in non-Asian populations lack large RCTs (Wildsoet et al., 2019).
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