Comparación de medidas de poder dióptrico corneal y astigmatismo entre un topógrafo basado en tecnología de diodo-emisor de luz a color (Cassini®) y un topógrafo basado en tecnología Scheimpflug (Pentacam®)

García-García, Alan Ernesto; Melián, R.; Carreras, Humberto; Rodríguez-Hernández, V.; Reñones, Josefina; Estévez, Benito Vilas

doi:10.1016/j.oftal.2018.11.014

Cited by 2 publications

(2 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Cassini system has been shown to determine consistent measures of posterior corneal curvature and astigmatism in healthy eyes, but only measures of posterior astigmatism could be considered as interchangeable with those provided by the Pentacam [40]. In another study, for the astigmatism analysis, measurements from the anterior cornea obtained with color-LED topography showed an excellent agreement with Pentacam measurements, but the agreement was poor for the corneal posterior surface and particularly the magnitude of astigmatism [41,42]. Furthermore, when analyzing corneal aberrometry measurements obtained with the Cassini device in healthy eyes, they were not interchangeable with results provided by the Scheimpflug-based topography [43].…”

Section: Color Light-emitting Diodementioning

confidence: 99%

See 1 more Smart Citation

Current Developments in Corneal Topography and Tomography

2021

View full text Add to dashboard Cite

Introduction: Accurate assessment of the corneal shape is important in cataract and refractive surgery, both in screening of candidates as well as for analyzing postoperative outcomes. Although corneal topography and tomography are widely used, it is common that these technologies are confused. The aim of this study was to present the current developments of these technologies and particularly distinguish between corneal topography and tomography. Methods: The PubMed, Web of Science and Embase databases were the main resources used to investigate the medical literature. The following keywords were used in various combinations: cornea, corneal, topography, tomography, Scheimpflug, Pentacam, optical coherence tomography. Results: Topography is the study of the shape of the corneal surface, while tomography allows a three-dimensional section of the cornea to be presented. Corneal topographers can be divided into large- and small-cone Placido-based devices, as well as devices with color-LEDs. For corneal tomography, scanning slit or Scheimpflug imaging and optical coherence tomography may be employed. In several devices, corneal topography and tomography have been successfully combined with tear-film analysis, aberrometry, optical biometry and anterior/posterior segment optical coherence tomography. Conclusion: There is a wide variety of imaging techniques to obtain corneal power maps. As different technologies are used, it is imperative that doctors involved in corneal surgery understand the science and clinical application of devices for corneal evaluation in depth.

show abstract

Section: Color Light-emitting Diodementioning

confidence: 99%

“…Although corneal topography and tomography are widely used, it is common that these technologies are confused [4,6,41,[80][81][82][83][84]. This corrigendum could be associated with the fact that at the time when corneal tomographers were developed, the nomenclature was not yet defined [8].…”

Section: Confusion In Terminologymentioning

confidence: 99%

Current Developments in Corneal Topography and Tomography

2021

View full text Add to dashboard Cite

show abstract

Comparative analysis of anterior corneal curvature and astigmatism measurements obtained with three different devices

Molina‐Martín

Piñero

Caballero

et al. 2020

Clinical and Experimental Optometry

View full text Add to dashboard Cite

Background The objective of this study was to compare the central corneal curvature and astigmatism measurements obtained with three different systems in healthy eyes and to assess the level of interchangeability between them. Methods This was a comparative study examining 30 healthy eyes of 30 patients (age 15–53 years). A complete eye examination was performed in all cases including analysis of anterior corneal curvature and astigmatism with three devices: the colour‐LED topography system Cassini (i‐Optics) (CAS), the Scheimpflug‐based system Pentacam (Oculus Optikgeräte) (PTC) and the optical biometer IOL‐Master 500 (Carl Zeiss Meditec) (IOLM). Differences between devices in terms of curvature in the flattest (flat K) and steepest meridians (steep K) as well as in the magnitude (AST) and power vector components of astigmatism (J0 and J45) were evaluated. The interchangeability between devices was evaluated with the Bland–Altman method. Results Statistically significant differences between devices were found in steep K and flat K (p < 0.001). No statistically significant differences between devices were found in AST (p = 0.057) and J0 power vector (p = 0.185). However, differences between devices in J45 did reach statistical significance (p = 0.039). Ranges of agreement for curvature measures ranged from 0.123 (flat K, CAS‐PTC) to 0.165 mm (steep K, CAS‐PTC). Ranges for the magnitude of astigmatism were 0.868, 1.059 and 0.739 D in CAS‐IOLM, PTC‐IOLM and CAS‐PTC comparisons, respectively. For J0 and J45, ranges of agreement were below 0.522 D. Conclusions Measurements of central corneal curvature and astigmatism obtained with the three devices evaluated cannot be used interchangeably.

show abstract

Comparación de medidas de poder dióptrico corneal y astigmatismo entre un topógrafo basado en tecnología de diodo-emisor de luz a color (Cassini®) y un topógrafo basado en tecnología Scheimpflug (Pentacam®)

Cited by 2 publications

References 28 publications

Current Developments in Corneal Topography and Tomography

Current Developments in Corneal Topography and Tomography

Comparative analysis of anterior corneal curvature and astigmatism measurements obtained with three different devices

Contact Info

Product

Resources

About