Reliability of Jackson Cross Cylinder Measurements of Mild to Moderate Astigmatism Using Three Different Targets.
Background: During the subjective measurement of astigmatic refractive error, the recommended targets for the Jackson Cross Cylinder (JCC) test are interchanged often depending on availability, convenience, and preference of clinicians. However, reliability of the JCC test becomes uncertain. Methods...
| Publicado en: | Optometry & Visual Performance Vol. 12; no. 3; pp. 147 - 154 |
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| Autores principales: | , , , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Optometric Extension Program
Sep2024
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=180663752&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 180663752 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 23253479 HOOW jtl: Optometry & Visual Performance issn: 23253479 maglogo: N pubinfo: dt: Sep2024 vid: 12 iid: 3 pid: 46881 pub: Optometric Extension Program place: Lutherville Timonium, Maryland artinfo: ui: 180663752 180663752 180663752 180663752 ppf: 147 ppct: 7 formats: tig: atl: Reliability of Jackson Cross Cylinder Measurements of Mild to Moderate Astigmatism Using Three Different Targets. aug: au: Hansraj, Rekha Al-Bulushi, Ilhaam Govender, Liyanah Khuzwayo, Sisanda Baphiwe Ncayiyana, Sizwe Qwabe, Jabulisile Zanele Mkhize, Amanda affil: University of KwaZulu-Natal, Durban, South Africa. sug: subj: Astigmatism Physiopathology Astigmatism Diagnosis Vision Tests Methods Refraction, Ocular Reproducibility of Results Physician Attitudes Evaluation Reliability and Validity Evaluation Human Male Female Adult Cross Sectional Studies Quantitative Studies Purposive Sample Validation Studies Pilot Studies Wilcoxon Signed Rank Test Confidence Intervals Refractive Errors Visual Acuity Observer Bias Statistical Significance Data Analysis Software Descriptive Statistics Adult: 19-44 years Male Female ab: Background: During the subjective measurement of astigmatic refractive error, the recommended targets for the Jackson Cross Cylinder (JCC) test are interchanged often depending on availability, convenience, and preference of clinicians. However, reliability of the JCC test becomes uncertain. Methods: A cross-sectional, quantitative research design was used to compare measurements of cylinder power and axis with the JCC test but with three different targets (a cluster of random dots, the letter O, and the letter H). Randomisation of order of targets was applied to prevent biases. Data was captured using SPSS (version 27) and analysed using dependent-samples Wilcoxon signed-rank tests and Bland-Altman plots at a 95% confidence level. Results: A total of 61 left eyes of 72 subjects, with cylinders of at least -0.50 D after subjective refraction, were analysed. The study found no statistically or clinically significant difference in the subjective measurement of cylindrical power and axis with the JCC test irrespective of the target used. Random dots and the letter H were the most and the least preferred targets, respectively. Conclusion: The clinical implication of this study is that random dots, circular letters, and non-circular letters can be used interchangeably to measure the cylinder power and axis of mild astigmatism. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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