The Repeatability of Axial Length Measurements Using a Scheimpflug-based System.
Purpose: To assess the repeatability of Pentacam AXL as a Scheimpflug-based system or measuring axial length according to the age, sex, lens type, axial length value, and type of cataract. Methods: The present study was conducted using multistage cluster sampling in Tehran, Iran. Ocular biometry was...
| Publicado en: | Journal of Ophthalmic & Vision Research Vol. 18; no. 4; pp. 396 - 405 |
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| Autores principales: | , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Knowledge E DMCC
Oct-Dec2023
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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=174336314&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 174336314 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 20082010 AY5S jtl: Journal of Ophthalmic & Vision Research issn: 20082010 maglogo: N pubinfo: dt: Oct-Dec2023 vid: 18 iid: 4 pid: 35682 pub: Knowledge E DMCC artinfo: ui: 174336314 174336314 174336314 10.18502/jovr.v18i4.14551 174336314 ppf: 396 ppct: 9 formats: fmt: @attributes: type: P tig: atl: The Repeatability of Axial Length Measurements Using a Scheimpflug-based System. aug: au: Sardari, Sara Khabazkhoob, Mehdi Jafarzadehpur, Ebrahim Fotouhi, Akbar affil: Research and Technology Deputy, Tehran University of Medical Sciences, Tehran, Iran sug: subj: Eye Physiology Body Weights and Measures Human Iran Multi-Stage Cluster Biometrics ab: Purpose: To assess the repeatability of Pentacam AXL as a Scheimpflug-based system or measuring axial length according to the age, sex, lens type, axial length value, and type of cataract. Methods: The present study was conducted using multistage cluster sampling in Tehran, Iran. Ocular biometry was performed, using the Pentacam AXL, by an experienced optometrist on all the participants. The axial length (AL) measurements were taken thrice, with a gap of 10 minutes. To evaluate the repeatability, the intraclass correlation coefficient (ICC) and the repeatability coefficient (RC) were calculated. To determine the significant difference in the repeatability index among study variables, the tolerance index (TI) was calculated. Results: In this report, 897 eyes of 677 individuals aged between 20 and 91 years (mean ±SD: 64.90 ±13.62 years) were reported. The ICC of the axial length measurements was 0.981 for all cases. Based on the within-subject standard deviation, the RC was 0.401. The ICC was 0.976 and 0.985 in men and women, respectively. The TI showed better RC of measurements among females. The ICC decreased from 0.999 in participants under 40 years to 0.973 in individuals over 60 years of age. The TI showed a decrease in RC with advancing age. The RC was worse in eyes with nuclear cataracts; the RC was also worse in the first quartile of the signal-to-noise ratio (SNR) compared to the other SNR quartiles. Conclusion: The Scheimpflug-based system Pentacam AXL had high repeatability in measuring axial length. Some variables such as male gender, older age, and nuclear cataract were associated with reduced repeatability of the measurements. A higher SNR was associated with better repeatability of the axial length measurements. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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