Evaluation of Normal Corneas Using the Scanning-Slit Topography/Pachymetry System

Módis, László; Langenbucher, Achim; Seitz, Berthold

doi:10.1097/01.ico.0000126315.05519.0b

Cited by 67 publications

(41 citation statements)

References 37 publications

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“…On the other hand, SSCT does not allow the corneal endothelium to be studied but allows anterior chamber depth, pupil size, and white-to-white measurements, 13 and it makes it possible to detect the corneal site with the minimum thickness value. 10,15 Thus, ophthalmologists can use SSCT or NCMS. Nevertheless, it must be known that SSCT and NCMS cannot be used interchangeably because of the differences observed between techniques when measuring CCT.…”

Section: Discussionmentioning

confidence: 99%

Quantitative Anatomical Differences in Central Corneal Thickness Values Determined With Scanning-Slit Corneal Topography and Noncontact Specular Microscopy

Sanchis‐Gimeno

Herrera²,

Lleó-Pérez³

et al. 2006

Cornea

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Section: Discussionmentioning

confidence: 99%

Quantitative Anatomical Differences in Central Corneal Thickness Values Determined With Scanning-Slit Corneal Topography and Noncontact Specular Microscopy

Sanchis‐Gimeno

Herrera²,

Lleó-Pérez³

et al. 2006

Cornea

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“…18 Using the Purkinje image method, the mean radius of curvature was 6.42 mm. 19 Módis et al 20 .47 mm for the same with the Pentacam. In our measurement obtained by using the Pentacam HR, the median of the anterior radius of the corneal curvature was 7.77 mm horizontally and 7.67 mm vertically; the radius of the posterior corneal curvature was 6.49 mm horizontally and 6.21 mm vertically.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Posterior Astigmatism Measured With Scheimpflug Imaging

Németh

Berta

Lipécz

et al. 2014

Cornea

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Purpose: Our aim was to assess the corneal power, axis, and age dependence of the anterior and posterior corneal surfaces with Scheimpflug imaging.Methods: Patients older than 10 years without a history of ocular surgery, corneal diseases, contact lens wearing, or severe dry eye were enrolled. Data regarding the anterior and posterior cornea were analyzed by means of Scheimpflug imaging (Pentacam HR).Results: The median age was 46.8 years (range: 10.0-90.3), and involved 827 eyes of 827 patients. Posterior corneal astigmatism was a median of 20.30 diopters (D) and exceeded 0.50 D in 12.56%. The ratio of the anterior-to-posterior corneal radius was a median of 1.217 (range: 1.021-1.402). The correlation between this ratio and age was significant (r = 20.219; P , 0.001). The correlation between anterior and posterior corneal astigmatism and age was significant. At the anterior surface, the ratio of with-the-rule astigmatism was 80.0% for the age range 10 to 20, decreasing to 36.0% for those aged over 81 years, whereas the ratio of against-the-rule astigmatism increased from 7.1% to 44.0%. At the posterior surface, the ratio of with-the-rule astigmatism was 94.3% for the age range 10 to 20 years, decreasing to 84.0% for those aged over 81 years, whereas the ratio of against-the-rule astigmatism increased from 1.4% to 8.0%. Conclusions:The posterior cornea significantly influences corneal astigmatism. Its power value and orientation are much more stable with advancing age compared with anterior surface values.

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“…The thinnest area, though rarely outside the central 2 mm, is also rarely at the geometric center of the cornea. 15,31 A conservative approach in corneal refractive surgery led the authors to use the thinnest area data provided by the Orbscan instrument since the instrument became available. This same clinically conservative approach in the authors' practice uses the lowest of three central ultrasound pachymetry measurements.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Central Corneal Thickness Measured by Four Different Pachymeters

Myrowitz¹,

Ren²,

Chuck³

2007

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

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In 45 consecutive patients tested on one visit by the same clinician, CCT measured with three ultrasonic pachymeters, including two hand-held units, was clinically comparable in group 2. CCT measured with two ultrasonic pachymeters (i.e., PachMate and PachPen) was clinically comparable in group 1. The Orbscan II data differ from the other three instruments in both groups but more in the patients who had undergone LASIK (group 2).

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Evaluation of Normal Corneas Using the Scanning-Slit Topography/Pachymetry System

Abstract: Orbscan scanning-slit topography seems to be a reliable technique for the evaluation of normal corneas not only for anterior shape and curvature but also for a real pachymetry gradient recording.

Cited by 67 publications

References 37 publications

Quantitative Anatomical Differences in Central Corneal Thickness Values Determined With Scanning-Slit Corneal Topography and Noncontact Specular Microscopy

Quantitative Anatomical Differences in Central Corneal Thickness Values Determined With Scanning-Slit Corneal Topography and Noncontact Specular Microscopy

Evaluation of Posterior Astigmatism Measured With Scheimpflug Imaging

Comparison of Central Corneal Thickness Measured by Four Different Pachymeters

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