Comparison of Corneal Tomography: Repeatability, Precision, Misalignment, Mean Elevation, and Mean Pachymetry

Schröder, Simon; Mäurer, Stephanie; Eppig, Timo; Seitz, Berthold; Rubly, Kathrin; Langenbucher, Achim

doi:10.1080/02713683.2018.1441873

Cited by 38 publications

(50 citation statements)

References 29 publications

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“…The calculation of corneal SA requires highest precision of corneal topography in the periphery, since the difference in elevation between an aspheric corneal surface and a spherical surface is only some microns (Figure 4). Schröder et al investigated the measurement repeatability and precision of several corneal topographers and tomographers and found that the repeatability of these devices is decreasing from the center to the periphery and may not be sufficient to detect small changes in corneal asphericity [38].…”

Section: Limitations Of Aberration-correcting Lensesmentioning

confidence: 99%

Aberration Correction with Aspheric Intraocular Lenses

Eppig¹,

Schrecker²,

Messner³

et al. 2020

Intraocular Lens

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The shape of the normal human cornea induces positive spherical aberration (SA) which causes image blur. In the young phakic eye, the crystalline lens compensates for a certain amount of this corneal aberration. However, the compensation slowly decreases with the aging lens and is fully lost after cataract extraction and implantation of a standard intraocular lens (IOL). Conventional spherical IOLs add their intrinsic positive SA to the positive SA of the cornea increasing the image blur. As a useful side effect, this also increases the depth of focus-often referred to as pseudo-accommodation. Aspheric intraocular lenses have been introduced to be either neutral to SA or to compensate for a certain amount of corneal SA. A customized correction for the individual eye seems to be the most promising solution for tailored correction of SA. In this chapter we will provide detailed information on the various concepts of aspheric intraocular lenses to elucidate that the term "aspheric intraocular lens" is being used for a large amount of different lens designs.

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Section: Limitations Of Aberration-correcting Lensesmentioning

confidence: 99%

Aberration Correction with Aspheric Intraocular Lenses

Eppig¹,

Schrecker²,

Messner³

et al. 2020

Intraocular Lens

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“…In addition, a detailed wavefront parameter analysis with aberration quantification is demonstrated for both anterior and total corneal wavefront. It has been shown that SS-OCT pachymetry results are more repeatable than Scheimpflug imaging results, in healthy corneas [7]. Furthermore, SS-OCT has been shown to have higher reliability and repeatability than high-resolution Scheimpflug imaging in patients who have undergone corneal grafting [8].…”

Section: Ss-oct and Cornea Evaluationmentioning

confidence: 99%

Anterior Segment OCT

Asam

Polzer

Tafreshi

et al. 2019

High Resolution Imaging in Microscopy and Ophthalmology

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“…Earlier OCT devices were limited by acquisition time and could not perform corneal topography. SS‐OCT has been shown to be more repeatable than Scheimpflug and Placido‐ring devices in keratoconus and following corneal transplantation in measuring keratometry values, elevation, anterior chamber depth and corneal thickness …”

Section: Octmentioning

confidence: 99%

Optical coherence tomography imaging in keratoconus

Yip

Chan

2019

Clinical and Experimental Optometry

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Optical coherence tomography (OCT) is being increasingly used as a tool in the diagnosis and management of keratoconus. While elevation-based topography remains essential, there is an expanding role for cross-sectional OCT imaging in the diagnosis of the disease. Images and measurements of corneal thickness, and in particular, epithelial thickness, may be important in diagnosing early cases, and following procedures such as intrastromal corneal ring segments, corneal transplants and corneal collagen cross-linking.

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Comparison of Corneal Tomography: Repeatability, Precision, Misalignment, Mean Elevation, and Mean Pachymetry

Abstract: Misalignment limited the repeatability of TMS-5 and Pentacam HR, but had little influence on the repeatability of CASIA SS-1000.

Cited by 38 publications

References 29 publications

Aberration Correction with Aspheric Intraocular Lenses

Aberration Correction with Aspheric Intraocular Lenses

Anterior Segment OCT

Optical coherence tomography imaging in keratoconus

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