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Pachymétrie cornéenne
Measurement of the thickness of the CORNEA.
Synonyme(s)
Mesure de l'épaisseur cornéenne; Mesure de l'épaisseur de la cornée; Pachymétrie de la cornéeRelation(s)
- voir aussi au terme générique : [Descripteurs (mots clés)] Techniques de diagnostic ophtalmologique
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Comparing Repeatability and Agreement between Commonly Used Corneal Imaging Devices in Keratoconus / Lize Angelo in OVS : Optometry & Vision Science, vol. 100, 11 (Novembre 2023)
[article]
in OVS : Optometry & Vision Science > vol. 100, 11 (Novembre 2023)
Titre : Comparing Repeatability and Agreement between Commonly Used Corneal Imaging Devices in Keratoconus Type de document : article de périodique Auteurs : Lize Angelo ; Akilesh Gokul ; Charles N. J. McGhee ; Mohammed Ziaei Année de publication : 2023 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus HELB]:Paramédical:kératométrie
[Thésaurus Mesh]:K:Kératocône:Kératocône / diagnostic
[Thésaurus Mesh]Dépistage visuel
[Thésaurus Mesh]Diagnostic par imagerie
[Thésaurus Mesh]Kératocône
[Thésaurus Mesh]Optométrie
[Thésaurus Mesh]Pachymétrie cornéenneMots-clés : appareils d'imagerie cornéenne Résumé : SIGNIFICANCE: Keratometry and pachymetry are important for diagnosis and monitoring of keratoconus. Many corneal imaging units exist, but comparison to determine repeatability and agreement is paramount for adequate keratoconus management in primary and secondary care. PURPOSE: This study aimed to evaluate the repeatability and agreement of a Placido disc–based videokeratoscope (Melbourne, Victoria, Australia) used in primary care with spectral-domain optical coherence tomography (Optopol Technology, Zawiercie, Poland) and Scheimpflug corneal tomography (Oculus, Wetzlar, Germany) in secondary care. METHODS: This was a prospective single-center study where one eye was randomized to have central corneal thickness; thinnest corneal thickness (TCT); and maximum, mean, steep, and flat keratometry (Kmax, Kmean, Ksteep, and Kflat, respectively), measured with all three devices. Three measurements were completed per device to assess intraobserver repeatability. RESULTS: A total of 110 eyes from 110 patients with keratoconus were analyzed. Repeatability was best with the Pentacam for central corneal thickness, Kmax, Kmean, Ksteep, and Kflat parameters (precision, 9.21, 0.8, 0.38, 0.52, and 0.58). The Medmont had better repeatability than the Revo with Kmax, Kmean, Ksteep, and Kflat (precision, 1.41,1.35,1.43, and 1.59). Revo had the best repeatability with TCT (precision, 3.81). The intraclass correlation coefficient was >0.94 for all parameters in all devices. Agreement was generally poor between devices. However, there was good agreement between Pentacam and Medmont Kflat measurements (P > .05). CONCLUSIONS: Repeatability of keratometry parameters with the Pentacam and Medmont was greater than the Revo, suggesting a lower threshold for detecting change in anterior corneal parameters. The Revo had the greatest repeatability for TCT, suggesting a lower threshold for detecting thinning in disease progression and corneal-crosslinking safety. There was poor agreement between devices, and it is not recommended for them to be used interchangably. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Corneal Total and Epithelial Thickness Measured by Sonogage Ultrasound Pachometry and High-resolution Optical Coherence Tomography / Helen A. Swarbrick in OVS : Optometry & Vision Science, vol. 97, 05 (Mai 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 05 (Mai 2020) . - p. 346-350
Titre : Corneal Total and Epithelial Thickness Measured by Sonogage Ultrasound Pachometry and High-resolution Optical Coherence Tomography Type de document : article de périodique Auteurs : Helen A. Swarbrick ; Pauline Kang ; Rajini Pegud Année de publication : 2020 Article en page(s) : p. 346-350 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Dispositifs optiques
[Thésaurus Mesh]Pachymétrie cornéenne
[Thésaurus Mesh]Tomographie par cohérence optique
[Thésaurus HELB]:Optique:orthokératologieMots-clés : tomography, optical coherence corneal pachymetry optical devices Résumé : SIGNIFICANCE: This research questions the validity of using the Sonogage ultrasound (US) pachometer to measure corneal epithelial thickness and coincidentally provides confirmation for the conventional view of the mechanism of orthokeratology (OK) based on central epithelial thinning. PURPOSE: The Sonogage (Corneo-Gage Plus 1) pachometer uses A-scan US to measure total corneal thickness. It is claimed that this instrument can also measure corneal epithelial thickness. We sought to validate this claim by comparing total and epithelial thickness measurements with the Sonogage with those obtained with highresolution optical coherence tomography (OCT). METHODS: Fourteen non–contact lens wearers and 14 subjects who had worn Paragon CRT OK lenses overnight for greater than 1 month were recruited. Three OCT and five US measurements were taken in one eye of each subject. Depending on normality of data, paired t tests or Wilcoxon tests were used to compare total and epithelial thicknesses measured with the Sonogage pachometer and the Tomey Casia OCT. Pearson or Spearman correlation analyses were used to examine relationships between measurements obtained with the two instruments. RESULTS: There was a significant difference in total corneal thickness measurements between the two instruments. Although a significant correlation was found (r = 0.916, P < .001), the Sonogage consistently measured greater total corneal thickness than did the OCT (+19.5 ± 9.2 μm; P < .001). Epithelial thickness using the Sonogage showed little variation (range, 46.4 to 50.0 μm), whereas epithelial thickness using the OCT ranged from 30.7 to 54.7 μm. There was no significant correlation between epithelial thicknesses obtained with the two instruments (r = −0.135, P = .49). Epithelial thickness measured by OCT was significantly thinner in OK wearers (35.8 ± 2.8 μm) than in nonlens wearers (46.7 ± 4.5 μm, P < .001). CONCLUSIONS: The Sonogage is not able to measure epithelial thickness in vivo, returning essentially identical measurements over a range of epithelial thicknesses. Optical coherence tomography measurements confirm the conventional view of the mechanism of OK based on central epithelial thinning. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire